Portfolio Hedging: Covered Calls & Collars

Below ₹1,050 at expiry, the Call is worth nothing. The premium cushions a share-price fall by ₹20 per share. The position breaks even at ₹980, and a ₹900 expiry still leaves a ₹40,000 loss since the hedge began. So the premium is only a small buffer. If the share became worthless, this covered holding would lose ₹4,90,000 before costs. Keep that large remaining loss in view next to the ₹10,000 you collected.

At ₹1,050 and above, the gain at expiry stops growing at ₹35,000. At a ₹1,150 expiry the shares are up ₹75,000, but the short Call owes ₹50,000, partly offset by its ₹10,000 premium. The combined result is still positive, yet the shares alone would have gained more. That gap is upside you gave up. It does not mean the covered position lost money. At exactly ₹1,050 the Call is worth zero, so reaching the cap is not the same as being in the money.

The premium is cash in exchange for an open obligation. At entry, the ₹10,000 you receive comes with a short option that is worth ₹10,000 at the assumed fill, so your net wealth does not jump by ₹10,000. Later, buying that Call back may cost less or more than you received. The expiry curve describes the intact position on its end date. Selling the shares early, or closing the option early, changes what is left. Read the combined holding before you treat the premium as a return on your stock capital.

At a ₹900 expiry, the Put is worth ₹50 per share, offsetting the part of the fall below ₹950. Shares plus that right are worth ₹4,75,000, and the ₹2,500 opening credit takes the total to ₹4,77,500. The loss from the starting value is ₹22,500. It stays at that level for any lower final price, as long as the legs are matched. Above ₹1,050, the ceiling is ₹5,27,500, a gain of ₹27,500. Paying for the Put has lowered the covered Call’s ceiling in exchange for a floor.

The Put’s intrinsic value is not a separate profit. The premium you paid for the Put and the premium you received for the Call are already in the combined result. Physical settlement also changes how the same amount reaches your account. An exercised NSE stock Put delivers your shares at its strike. It does not leave the shares in your account and add a cash reimbursement on top. The settlement chapter follows those delivery routes. At an exact strike, that option is worth zero even though the combined curve has reached its boundary.

These limits belong to this stock quantity, these strikes and this expiry, with shares and both options intact and settlement completed. They are not permanent limits on your account. Once a Put is closed or expired, it gives no later protection, and a replacement hedge has its own premium, strikes and end date. You can still lose money inside the collar’s range if the stock falls. And a Put that goes unused in a rising market has still done its job. What a collar does is trade a narrower range of outcomes at expiry for a premium cost and some surrendered upside. It does not predict the market, and it does not improve every outcome.

At that same final price, the collar is worth ₹4,77,500 including its net credit. That is ₹77,500 above the old purchase cost and ₹22,500 below the wealth at the start of the hedge. If the in-the-money Put leads to delivery, record ₹4,75,000 of strike proceeds plus the ₹2,500 net option premium. Do not also keep the delivered shares in the final ledger. “Shares plus Put value” and “shares sold through the Put” are two ways to reconcile one outcome. They are not two payments to add together.

When we say the covered Call breaks even at ₹980, or the collar at ₹995, we use the ₹1,000 starting reference and include option premiums. These are economic comparisons at expiry. They do not say that a premium changes the shares’ purchase price or their tax cost basis. A journal can keep both references without mixing them. If a premium debit needs extra cash, count that cash in both the starting and the final account wealth. Otherwise the capital you are measuring quietly changes.

The same discipline applies right after entry. The collar combines ₹5,00,000 of shares, a ₹7,500 Put asset, a ₹10,000 short Call liability and ₹2,500 of net premium cash. Together they still net to ₹5,00,000 at the assumed fill. Later account value depends on all four pieces. That is why cash can arrive in your ledger while your wealth is unchanged, or even lower later. The reference price, the valuation date and whether a position has actually closed matter as much as the sign on the final number.

The figure shows the limits after premium. In the equal-premium case the loss floor at expiry is −₹25,000, the gain ceiling is +₹25,000 and breakeven is ₹1,000. In the debit case they move to −₹27,500, +₹22,500 and ₹1,005. A dearer Put pushes both outcomes down. The strikes at ₹950 and ₹1,050 stay where they are, which is why the distance between strikes alone does not give your full gain or loss. In all three cases the breakeven sits between the strikes. Keep that condition in mind before you carry the usual rule to other inputs.

“Zero-cost collar” is a common phrase for the equal-premium case. The precise term is zero net premium. It still ties up stock capital, gives up upside above the Call strike and incurs dealing costs. Future protection has its own price too. Different strikes can change what you receive or pay, but they change the protection and the ceiling at the same time. Read a larger Call receipt next to the obligation it creates. It is not a free improvement to the hedge.

Real option prices depend on time left, expected dividends, interest rates and implied volatility, the volatility that market prices reflect. Strikes can carry different implied volatilities, a pattern called skew, so a Put and a Call do not get cheaper or dearer by equal amounts. Quotes also have separate buying and selling prices, and your order may fill away from the midpoint. Our ₹20 and ₹15 premiums leave all of this out on purpose. They are not model prices. To judge an early close or a renewal, use the current contract terms and the cash flows that actually executed. Do not reuse the expiry limits as today’s exit value.

After these assumed fills, the net realised option result is only ₹300. The shares, marked at ₹1,020, are up ₹10,000 from the ₹1,000 starting reference, so the combined marked change is ₹10,300. The share gain is unrealised, because no share sale is assumed, and this reference does not replace your older purchase cost. With both options closed you hold ordinary long shares. The Put floor ends once its closing sale fully fills, and the Call ceiling ends too. Close only the Call and you keep a protective Put. Close only the Put and you keep a covered Call.

The ₹12 Call buyback and ₹8 Put sale are assumed fills. They are not derived from the ₹1,020 stock mark. Before expiry, even an out-of-the-money option keeps some time value. A last trade, a midpoint or a submitted order is not an executed trade. Record the filled quantity and the average executed premium, because a partly filled exit leaves the rest open. In a real journal, use the charges on your contract note. The ₹200 here is an invented total for option charges, counted once. Any spread or slippage already inside the fill prices must not be deducted again.

A roll is a close followed by a new opening trade, at a new strike, a new expiry or both. In a separate covered-Call example, you sold the old Call at ₹20 and buy it back at ₹35. The realised loss on 500 units is ₹7,500, before charges. Selling a different Call at ₹25 brings in ₹12,500, but it opens a new short obligation. Across the two roll-day fills you pay a net ₹5,000. The new receipt is not profit, and it does not erase the old loss. Record the new contract and its liability separately, and check that its quantity and expiry still match your shares and any Put you still hold.

Start with units and time, not the strategy name. Fewer Put units than shares leave some shares unprotected. More short Call units than matching shares leave the extra uncovered, and unrelated holdings cannot supply the missing SBIN shares. A Put that expires before your intended holding period leaves later exposure unprotected, and a later-dated Call can stay open after the Put has ended. Those positions do not share the single floor and ceiling of a balanced collar with a common expiry. Check the actual lot size of the contract you choose. Do not convert our assumed 500 units into a current contract count.

An index overlay is a different hedge. A NIFTY ETF gives related exposure, but its return can differ from the index. A mixed stock portfolio can differ even more, because its companies, sectors and weights are different. This gap is basis risk: the hedge and the asset do not move in exactly the same way. Beta estimates sensitivity to an index, and correlation describes how returns move together. Both can change, so equal rupee values or a beta-based estimate do not guarantee a portfolio floor. NSE index options settle in cash. They do not take ETF units or your shares as delivery. A futures overlay also brings margin and daily cash settlement.

Before expiry, the Greeks give local sensitivity. They are not a fixed loss limit. Delta estimates how the position responds to a small stock-price move with other inputs unchanged. Using each option’s long-position Delta, matched shares plus a short Call have a per-share Delta of 1 − Call Delta. Add the bought Put and it is 1 − Call Delta + Put Delta, where Put Delta is negative. The written Call offsets some of the shares’ bullish exposure, but the combined holding is not automatically neutral. Gamma is how Delta changes. In an ordinary vanilla-option model, a covered Call has negative Gamma, while the collar’s Gamma is Put Gamma minus Call Gamma. Either option can dominate as the stock moves relative to its strike.

The same signed-leg method works for time and volatility. Theta is sensitivity to passing time. Vega is sensitivity to implied volatility. For this matched collar, net option Theta is long-Put Theta minus long-Call Theta, and net Vega is long-Put Vega minus long-Call Vega. The signs depend on the legs and the pricing conditions, so a collar is not always Theta-positive or Vega-neutral. Volatility can also move differently at the two strikes, so one parallel-shift Vega cannot describe every shock. These are model sensitivities. They are not Greeks worked out from our assumed premiums. Look at the concentration of the rest of your portfolio and at the protection horizon alongside the option overlay.

Our ₹950 Put strike is below the ₹1,050 Call strike, so the two options cannot both be in the money at the same expiry settlement price. Below ₹950, the long Put is the route to sell the shares. Above ₹1,050, the short Call requires delivery. Between the strikes, neither creates an in-the-money exercise obligation. At an exact strike, that option is worth zero. A Put exercise sells the shares for the strike proceeds. Do not count those delivered shares as still held and then add a cash payment for the Put’s intrinsic value on top. Opening premium cash goes into the combined ledger only once.

Economic coverage needs the same stock in enough deliverable quantity. Shares you have sold, lent or otherwise cannot deliver may no longer meet the obligation. A demat holding is also not margin collateral. Owning the shares does not automatically fund the sold Call’s margin. Eligible securities accepted as collateral go through a separate margin-pledge process, subject to eligibility, valuation and the margin rules. SEBI’s 3 June 2025 circular set up a way to release a pledge for early pay-in, checked against the client’s delivery obligation. If your shares are pledged, confirm the delivery process that applies and how releasing collateral changes your available margin. Do not assume that pledged shares can never be delivered, or that every broker completes the process for you.

Settlement netting is a third, conditional process. Qualifying stock-expiry obligations and matching cash-market trade obligations in the same security can be netted only when the clearing rules’ conditions on client, trading member, clearing member and clearing corporation match. Some client categories are excluded. A demat balance on its own is not an offsetting cash-market trade obligation, so it does not automatically cancel option margin or complete delivery. Any margin benefit applies only to the part that can be offset, and the residual obligations still carry their usual requirements.

Before you carry a stock option into expiry, confirm the shares or funds you need, the delivery margins that apply, and your broker’s current instructions and cut-off times. Broker risk deadlines can come before the exchange’s settlement deadlines, and trying to square off is not proof of a fill. A shortfall in delivery can lead to auction or close-out under the clearing process. After a notified corporate action, recheck the adjusted strikes, quantities and expiry against the shares you hold. These operational checks keep the real position in line with the assumptions behind the teaching payoff.