12 Beginner Mistakes That Drain Capital

What it looks like: you open the app with no idea what you are looking for. Something moves. You buy. There is no entry rule, no exit rule and no size rule, so the position is whatever felt right in that moment.

Why the brain does it: writing a plan means agreeing in advance how you could be wrong. A plan that lives only in your head can be quietly changed later, so you never have to admit the market proved you wrong. That feels safer. It is not.

A real plan, in one sentence. On 19 Oct 2026 ITC opened at ₹262.70 on NSE. Its lowest price of the past year was ₹253.15, on 8 Oct 2026. A written plan could read: 'If ITC holds above its 8 Oct low, I buy at ₹262.70, my stop is ₹253.10 (one tick below that low), and I risk no more than ₹2,000.' The ₹2,000 budget is an illustration (1% of a ₹2,00,000 account).

The sentence then sets the size for you. Risk per share is ₹262.70 − ₹253.10 = ₹9.60. ₹2,000 ÷ ₹9.60 = 208.3, rounded down to 208 shares. The position is 208 × ₹262.70 = ₹54,641.60, and the planned worst loss is 208 × ₹9.60 = ₹1,996.80 before charges (all derived). Without the sentence, none of these numbers exist. The loss limit is simply unknown.

On record: SEBI's intraday study (press release 13/2024, 24 Jul 2024) found that 71% of individual intraday traders in the equity cash market had a net loss in FY 2022-23. A plan cannot promise you a place in the other 29%, but trading without one is how most people decide size and exit in the moment.

An example process check: before any order, write one line: 'If [condition], I buy [N] shares at [entry], my stop is [S], my exit is [target or condition].' If you cannot write the line, you do not have a trade. You have an urge. Lesson 23 (Risk Management 101) and lesson 12 (your first trade on paper) teach this line in full.

What it looks like: a message arrives with a stock name, a 'target' and a push to act now: 'entry only today', 'sure shot', 'join the VIP group'. You buy. Now you hold a position whose reasoning lives in someone else's head.

Why the brain does it: a tip hands you a finished decision, and the group around it makes it feel safe. It also moves the blame: if it fails, it feels like someone else's mistake.

Who is allowed to advise you. In India, a person who gives investment advice for a fee must be registered with SEBI as an Investment Adviser, and a person who publishes research recommendations must be registered as a Research Analyst. You can check any name on SEBI's list of registered intermediaries (sebi.gov.in/intermediaries.html). Since amendments notified on 26 Aug 2024 (SEBI circular of 22 Oct 2024), SEBI-regulated firms may not associate with people who give advice without registration, or who claim returns or performance without SEBI's permission.

Four warning signs, each with a real rule behind it. First, a promise of assured or guaranteed returns: NSE's 'Caution for Investors' (19 Jan 2026) tells investors not to subscribe to any scheme offering indicative, assured or guaranteed returns, as these are prohibited by law. Second, live trading or live prices in a 'class': SEBI (press release 48/2026, 17 Aug 2026) warned about 'live trading strategies' on social media; under its circular of 8 May 2026, people who only educate may use price data with a 30-day lag and must not hint at future prices. Third, any request for your OTP, password or login: NSDL tells investors 'Do not share the OTP or password with anyone' (circular NSDL/POLICY/2022/104, 25 Jul 2022), CDSL says the same about its OTPs and e-DIS logins, and NSE tells investors not to share trading credentials such as user ID and password. Fourth, fake profiles and 'VIP' WhatsApp groups with fake testimonials of huge profits: SEBI's caution on social-media scams (press release 27/2025, 21 May 2025) names these tricks.

When you do pay a registered firm, check where the money goes. Since 1 Oct 2025, major brokers (covering over 90% of investors) and all mutual funds collect through validated UPI handles that end in '@valid' with a suffix such as '.brk' or '.mf', and 'SEBI Check' lets you confirm a firm's bank account or UPI ID (SEBI press release 64/2025).

A case on record: the Baap of Chart matter. SEBI's final order of 2 Dec 2024 (WTM/AS/MIRSD/MIRSD-SEC-6/31009/2024-25) found that investment advice had been given for a fee without SEBI registration. It ordered ₹17,20,76,616 collected as fees to be refunded within three months, barred the people involved from the market for six months to one year, and imposed penalties.

A case still being decided: in an ex-parte interim order dated 4 Dec 2025, SEBI alleged that Avadhut Sathe Trading Academy gave unregistered advice under the label of education and collected about ₹601 crore from more than 3.37 lakh people. These are preliminary findings, not a final decision. The order was appealed; the Securities Appellate Tribunal reportedly upheld SEBI's prima facie case in Jan 2026 but cut the required deposit to ₹100 crore.

An example process check: take only a trade whose reason you could explain to a friend in two sentences without saying where you heard it. And never let anyone else hold your OTP, password or trading login. Lesson 05 (SEBI and investor protection) shows how to check a registration and where to complain.

What it looks like: a share has run hard and is on every screen and in every group. Every minute you wait it seems higher. You buy near the top, often at a bigger size than usual, because you feel you 'have to make up for missing the start'.

Why the brain does it: fear of missing out (FOMO) is the dislike of losing, pointed at a loss that has not happened. Watching a move you are not in feels like losing money, even though nothing has left your account.

A real pump and dump: the Sadhna Broadcast matter. SEBI's orders in this case dealt with misleading YouTube videos that pushed the company's share to small investors while some of the people involved sold. In an ad-interim ex-parte order of 2 Mar 2023, SEBI restrained 31 entities. Its confirmatory order of 31 Oct 2023 refers to ₹41,85,82,283 of alleged illegal gains impounded under the interim order. The final order of 29 May 2025 (WTM/AB/ISD/ISD-SEC-5/31442/2025-26) barred some of those involved from the market for five years and others for one year, as recorded in NSE circular INVG68258.

What it did to buyers. As reported in the press, the share rose from about ₹2.55 in March 2022 to ₹33.15 in October 2022, then fell back to around ₹2.60 by the time of the final order. Someone who bought at ₹33.15 and held would be down about 92.2% (derived from the reported prices: (₹2.60 − ₹33.15) ÷ ₹33.15). The rise was real on the screen. The reason for it was not.

A share that falls on very low demand can also hit its lower price band day after day. Reaching the band does not mean trading stops, but if sellers far outnumber buyers your sell order may not fill. Lesson 05 and the circuit-limits lesson explain how these bands work.

On record: SEBI's caution on social-media scams (press release 27/2025, 21 May 2025) lists the tools of such schemes: unsolicited invitations to 'VIP' WhatsApp groups, fake profiles that copy registered firms or celebrities, fake testimonials of huge profits and false assurances of unreasonable returns.

An example process check: before the market opens, write the highest price you are willing to pay, and use a limit order at or below it. If the move has already happened, let it go. Lesson 12 (your first trade on paper) shows how to set a limit price and a written maximum.

What it looks like: within weeks of opening an account, a beginner is buying index options because the price per lot looks small and the percentage moves look dramatic. It feels like a fast way to learn. It is usually a fast way to lose.

Why the brain does it: the entry cost is low and the success stories are loud. A small outlay that sometimes multiplies makes a gripping story, and the small ticket hides how large the exposure really is.

What the regulator found. SEBI's study (press release 22/2024, 23 Sep 2024) covered more than 1 crore individual traders in equity F&O: 93% of them lost money over FY22 to FY24. Their average loss was about ₹2 lakh each, including transaction costs, and their combined losses were more than ₹1.8 lakh crore over the three years. Only 1% made more than ₹1 lakh of profit after costs. An earlier SEBI study (Jan 2023) had found 89% lost money in FY22.

The latest figures are similar. SEBI's study of FY26 (press release 50/2026, 20 Aug 2026) found 87.7% of individual traders lost money, with an average loss of about ₹1.17 lakh and about 92% of all losses coming from options. About 97% of traders mainly bought options. In FY26, 59% of index options turnover was in contracts on their expiry day. Younger traders fared worse: 89% of traders under 30 lost money, against 81% of those over 60.

Why a small premium is still a large bet. The premium is the price you pay to buy an option. Since NSE's revision (circular NSE/FAOP/70616, 3 Oct 2025) one Nifty 50 lot is 65 units. At the Nifty 50 close of 22,811.35 on 21 Oct 2026, one lot is linked to 65 × 22,811.35 = ₹14,82,737.75 of index value (derived). That is the notional value, the full value the contract is linked to; it is not the same as how much the premium will move.

Now suppose the premium is ₹120 (an illustration). One lot costs 65 × ₹120 = ₹7,800. Time decay generally erodes an option's time value as expiry nears, other things held equal, though the premium can still rise if the index or volatility moves. If the premium drifts to ₹40, you are down 65 × ₹80 = ₹5,200, which is 66.7% of what you paid (derived), with no market crash needed. A bought option can lose its whole premium.

An example process check: learn in delivery-based shares first, with a set number of trades, journalled, before you even enable the derivatives segment. Lesson 23 (Risk Management 101) covers position size, and lesson 24 explains margin and leverage before you go near them.

What it looks like: you buy without deciding where you are wrong. The price dips and you call it noise. It falls further and you decide you are a long-term investor now. The position is never closed. It is just renamed.

Why the brain does it: selling makes a loss feel final, so holding keeps hope alive. But the loss has already happened in the market price. Selling records it; holding does not guarantee it comes back. People will often accept a large possible loss to avoid a certain small one, which is the wrong instinct in markets.

A real fall. ITC closed at ₹420.35 on 31 Oct 2025, after touching its past-year high of ₹426.40 that day. On 8 Oct 2026 it touched ₹253.15. From high to low that is a fall of 40.6%, and climbing back from ₹253.15 to ₹426.40 needs a gain of 68.4% (both derived from NSE bhavcopy prices). Even the Nifty 50, a basket of 50 large companies, fell 15.6% from its close of 26,328.55 on 2 Jan 2026 to 22,231.80 on 8 Oct 2026, and needs a gain of 18.4% to get back (derived).

Now put money on it. Suppose you bought 100 ITC shares at the ₹420.35 close on 31 Oct 2025 (the quantity is an illustration), paying ₹42,035. With no stop, at the ₹260.80 close on 19 Oct 2026 they were worth ₹26,080: a price loss of ₹15,955, or 38.0% (derived, before charges and leaving out the ₹6.50 interim and ₹8 final dividends ITC declared for 2025-26). With a stop written 10% below entry, at ₹378.30 (an illustration), the price loss would have been about ₹4,205 if it filled there. A stop does not guarantee that price: a share can open below it.

Losses are not symmetric. After a 38.0% loss, getting back to where you started needs a gain of 61.2% (derived: ₹42,035 ÷ ₹26,080). The deeper the hole, the steeper the climb. The table below is pure arithmetic.

An example process check: decide the stop before the entry. Make it a price where your reason for the trade stops being true, not just a rupee amount you could bear. If you cannot find that price, the setup is not clear enough to trade. Lesson 23 (Risk Management 101) shows how to place it.

What it looks like: you have ₹2,00,000, you like ITC at ₹260.80, so you buy 766 shares because that is what the money buys. Your bank balance decided the size, not your risk. Now an ordinary bad day does serious damage to your account.

Why the brain does it: a strong opinion feels like it deserves a big bet. And the order screen asks 'how many shares?', which invites you to answer with what you can afford instead of what you can risk.

Done properly. Take ₹2,00,000 of capital and a 1% risk budget, so ₹2,000 of planned price risk per trade (both illustrations). Entry is ₹260.80, ITC's close on 19 Oct 2026; the stop is ₹253.10, one tick below the 8 Oct 2026 low of ₹253.15. Risk per share is ₹7.70. ₹2,000 ÷ ₹7.70 = 259.7, so 259 shares. The position is 259 × ₹260.80 = ₹67,547.20, about a third of capital, and the planned price loss is 259 × ₹7.70 = ₹1,994.30 (all derived). Charges, gaps and slippage can make the real loss larger.

Done the beginner way. Buy 766 shares because you can: 766 × ₹260.80 = ₹1,99,772.80. The same fall to ₹253.10 now costs 766 × ₹7.70 = ₹5,898.20, nearly three times the budget, from the same idea and the same stop (derived).

A tight stop is not a licence for a huge position. Put the stop at ₹259.90, just below ITC's 19 Oct low of ₹259.95, and the formula says ₹2,000 ÷ ₹0.90 = 2,222 shares, worth ₹5,79,497.60. That is far more than your ₹2,00,000. Capital caps it at 766 shares, and a stop that close can be skipped over by an ordinary gap at the next open.

An example process check: size is an output, never an input. Divide the risk budget by the distance from entry to stop, round down, then check it fits your capital and any lot size. Lesson 23 (Risk Management 101) works through more examples.

What it looks like: the position is down, so you buy more to bring your average price down. It feels like a repair. In fact it is a second, bigger bet on an idea the market has already rejected once, usually with no new information.

Why the brain does it: it turns a losing decision into an 'unfinished' one. A lower average price feels like progress even while the money at stake grows. You are also anchored to your first entry price, a number that means nothing to anyone else.

A real path, illustrative quantities. Buy 100 ITC shares at ₹420.35 (31 Oct 2025 close): ₹42,035. ITC slides through the year. On 8 Oct 2026 it closes at ₹255.00 and you buy 100 more: ₹25,500. You now hold 200 shares at an average of about ₹337.68, with ₹67,535 committed. At the 19 Oct 2026 close of ₹260.80 they are worth ₹52,160: down ₹15,375 (all derived, before charges and dividends).

Compare the three choices. Holding the first 100 without adding: down ₹15,955 on ₹42,035. Averaging down: down ₹15,375, but on ₹67,535, with every further rupee of fall now costing twice as much. A stop written 10% below entry at ₹378.30 (illustration): down about ₹4,205 if it filled there, with ₹37,830 back in cash for the next idea. Averaging lowered the average price. It did not lower the risk; it raised it.

There is a legitimate version, and the difference matters. A staged entry planned before the first order, with set levels and one stop below all of them, is a plan. Adding because the price fell and you feel bad is not. The test: was the second buy written down before the first?

An example process check: no addition below your stop, and no addition that was not in the original plan. If you want to buy more of a falling share, treat it as a new trade with its own stop and size that fits your risk budget alongside what you already hold. Lesson 23 (Risk Management 101) covers this.

What it looks like: a position goes 4% your way and you take the money, because a small profit in hand feels wonderful. A position goes 4% against you and you hold, because closing it would admit the mistake. Over time your wins are small and your losses are big, and you cannot see why you lose when you are 'right most of the time'.

Why the brain does it: this is called the disposition effect, the habit of selling winners too soon and holding losers too long. Gains create an urge to lock in certainty; losses create an urge to gamble on a recovery. Both come from avoiding regret, and both point the wrong way.

An illustration: ten trades of ₹20,000 each. You book winners at +4% (₹800) and hold losers until they are down 12% (₹2,400). Six wins and four losses is a 60% hit rate, which sounds good. The arithmetic: 6 × ₹800 = ₹4,800 of gains against 4 × ₹2,400 = ₹9,600 of losses. Net: −₹4,800, before costs. You were right more often than wrong and still lost money.

On record: SEBI's FY25–FY26 study of F&O traders (press release 50/2026, 20 Aug 2026) found that among traders with both profitable and loss-making quarters, nearly 79% had average gains in their good quarters smaller than their average losses in their bad ones. That is this mistake, measured across a whole market.

Hit rate alone cannot tell you whether a method makes money. Hit rate, average win, average loss and costs decide the result together. Before costs, a 40% hit rate with wins three times the size of losses comes out ahead; a 70% hit rate with losses three times the size of wins comes out behind. Past results do not promise future ones.

An example process check: write the exit rules for a winner before you enter, and track hit rate, average win, average loss and costs together in your journal. Lesson 23 (Risk Management 101) and lesson 26 (Trading Psychology) go deeper.

What it looks like: you take a loss in the morning. Within minutes you are back in, in something you had not prepared, at a bigger size, because you want the morning undone in one move. The second trade has no setup; its only job is to erase a feeling.

Why the brain does it: an open loss feels like an unfinished task that must be closed today. It also bends the size decision, because a normal position would not win the loss back fast enough. That is the tell: when the reason for the size is 'so I can get it back quickly', the trade is emotional.

An illustration of one day (NSE trading hours, 9:15 a.m. to 3:30 p.m.). Your normal trade is ₹50,000, risking ₹1,000. You take the ₹1,000 loss. Feeling behind, you take the next trade at three times the size, ₹1,50,000, risking ₹3,000. It fails too. The day is now −₹4,000, four times your planned worst case. With a breaker set at two losses or ₹2,000 a day, and the second trade at normal size, the day would have stopped at −₹2,000.

It rarely stops at one. The third trade is bigger again, because now there is ₹4,000 to recover. That is how a routine losing morning becomes a week's damage in ninety minutes.

On record: in SEBI's study of FY22 to FY24 (press release 22/2024), more than 75% of loss-making F&O traders kept trading. Its FY26 study (press release 50/2026) found that of traders who lost two years in a row and kept trading, about 90% lost again, and about 85% of trader-quarters were loss-making. Trading more did not dig people out.

An example process check: a daily circuit breaker, written down and not up for debate. Two losses in a session, or a set rupee loss for the day, and you stop placing orders. Many people add a thirty-minute gap after any losing trade before the next order. Lesson 26 (Trading Psychology) and lesson 23 (Risk Management 101) explain why this works.

What it looks like: you trade because the market is open, not because you have a setup. Boredom and a screen full of movement produce several round trips a day. Each one feels small. Added up, they can be the largest cost in a beginner's year.

Why the brain does it: activity feels like work, and doing nothing feels like wasting the day. Now and then a random trade pays, and that occasional reward is exactly what makes a habit hard to stop.

What one round trip really costs. Lesson 08 uses real rates: Sahi's brokerage of ₹10 or 0.05% per order, whichever is lower, plus the statutory charges. For a ₹50,000 intraday round trip (buy and sell at the same price): brokerage ₹20, STT ₹12.50 (0.025% on the sell), NSE transaction charge ₹3.07, SEBI fee ₹0.10, stamp duty ₹1.50 (0.003% on the buy) and GST ₹4.17 (18% on brokerage, exchange and SEBI fees). Total: ₹41.34 (derived). The same trade as delivery costs about ₹150.77, mostly because STT is 0.1% on both sides, plus ₹15.93 of depository charges with GST (derived). Rates change; your contract note is the final word.

Now multiply. Assuming 250 trading sessions a year (a teaching assumption): one intraday round trip a week is ₹2,149.68 a year, one a day is ₹10,335, two a day is ₹20,670, and five a day is ₹51,675 (derived). On ₹1,00,000 of capital (illustration), five a day costs more than half your capital every year before you earn a rupee.

On record: SEBI's intraday study (press release 13/2024, 24 Jul 2024) found that 80% of individual intraday traders with more than 500 trades a year lost money, and that loss-makers spent a further 57% of their trading losses on trading costs, while profit-makers spent 19% of their profits on costs. In F&O, individuals spent about ₹50,000 crore on transaction costs over FY22 to FY24, 51% of it brokerage, and about ₹26,000 each in FY24 (press release 22/2024).

Then tax. Gains on listed, STT-paid shares held as an investment and sold within a year are taxed at 20%; gains on shares held longer than a year are taxed at 12.5% above ₹1.25 lakh a year (rates set on 23 Jul 2024). Intraday and derivatives profits are treated as business income and taxed at your slab rate. An illustration: ₹40,000 of short-term gains, ₹15,000 of deductible transfer costs (not STT), so ₹25,000 is taxable. At 20% that is ₹5,000, plus 4% cess of ₹200, leaving ₹19,800 (derived). Rules change with each Budget; lesson 08 keeps the current figures.

An example process check: a written cap on trades per week, every trade taken only from your prepared watchlist, and once a quarter add up all your charges and tax and set them against your gross profit. Lesson 08 (Brokerage, Charges and Taxes) shows how to read a contract note line by line.

What it looks like: you have traded for eight months and cannot answer basic questions about yourself. Which setups make you money? What is your average loss? Without a record, every month starts from zero and the same mistake can repeat for ever without being named.

Why the brain does it: a journal is admin, and it makes you write down the trades you would rather forget. Memory keeps the wins bright and files the losses under 'bad luck'. A journal removes that comfort, which is exactly why it works and exactly why people skip it.

Two real days, two log entries (quantities are illustrations; prices are ITC's real NSE prices). On 8 Oct 2026 ITC opened at ₹264.00 and closed at ₹255.00, after a low of ₹253.15. Buying 100 shares at the open on a 'sure shot' message, with no stop, and still holding at the close: −₹900, plan broken. On 19 Oct 2026 ITC opened at ₹262.70 and closed at ₹260.80. Buying 208 shares at the open on the written plan from Mistake 1, stop ₹253.10: −₹395.20 at the close, still open, plan followed (derived). 20 Oct 2026 was an NSE holiday for Dussehra: no trade, and that is a fine entry too.

What the record teaches. Suppose after forty trades you sort them by where the idea came from (an illustration). The twelve taken because someone else named the stock netted −₹9,000. The twenty-eight taken from your own written plan netted +₹11,000. Your account shows +₹2,000, so you decide you need 'a better strategy'. The journal says something far more useful: one habit is costing ₹9,000 and the rest is working. Without the record, you would change the wrong thing.

An example process check: a few fields per trade, filled the same day: date and stock, the one-line plan, entry and stop, size, result. Then the column that matters most: did I follow the plan, yes or no. Review it every weekend. Lesson 12 (your first trade on paper) includes a journal page to copy.

What it looks like: everything you buy goes up. Your returns look excellent. You decide you have found something, and the natural next step is to do more of it with more money, often borrowed money. It is the most dangerous mistake in the list because it feels like success while it is happening.

Why the brain does it: people credit good outcomes to skill and bad ones to luck. In a rising market almost every method works, so the feedback is positive whether or not the process is sound.

The real index. The Nifty 50 closed 2022 at 18,105.30 and 2023 at 21,731.40: a rise of 20.0% (derived from NSE closing values). It then rose 8.8% in 2024 (to 23,644.80) and 10.5% in 2025 (to 26,129.60). In 2026 it turned: from 26,328.55 on 2 Jan to 22,231.80 on 8 Oct, a fall of 15.6%, and at the 21 Oct close of 22,811.35 it was down 12.7% for the year so far (derived).

Now suppose your portfolio rose 30% in 2023 (an illustration), making ₹30,000 on ₹1,00,000. Be precise about what happened: you beat the Nifty 50 by 10 percentage points. That gap alone does not prove skill. How much you held in shares, which sectors, how much risk you took, your costs and your cash flows all matter.

Then you scale. You commit the whole ₹1,30,000 and use margin, money lent by the broker, to hold about ₹3,25,000 of shares, two and a half times your capital (illustration). The market turns, and your holdings fall 15.6%, the same as the Nifty 50 from 2 Jan to 8 Oct 2026. That is about ₹50,700 lost (derived): all of the ₹30,000 gain and ₹20,700 of your original money, before margin interest. You end below where you started.

An example process check: compare every result with a broad index over the same period, and look into the difference rather than assuming it proves skill. Never raise size because of a good run; raise it only on a schedule you wrote in advance, and never raise size and add borrowing in the same step. Lesson 13 (Market Indices) explains benchmarks, and lesson 23 (Risk Management 101) covers sizing.

Here are the twelve lines together, in the order a pilot would run them: six before the order, three during the trade, three after the close. Each one is a decision you can check: your reason, your size, your exit, your costs and your record. They are examples to adapt, not a tested formula for profit.

You will not install all twelve at once. Pick the three you recognised most uncomfortably, write them on a card and keep it where you trade. Add the next three after a month of the first three actually holding.

The honest framing: none of this makes you good at markets. It makes you survivable, and survival buys the years of experience in which you might get good. SEBI's studies show how many people never get those years.

Markets carry real risk. Even a careful plan can lose money, and orders can fill at a different price from the one you expected. Read the risk disclosures before committing money, and never trade with money you need for essentials.