Synthetics and the Covered Call

Options are flexible enough to imitate other instruments and to team up with them. In this chapter you meet two ideas that connect the options world to ordinary buying and holding. The first is the synthetic future, where a call and a put combine into something that behaves exactly like a futures position, a straight diagonal line of profit and loss. The second is the covered call, where you hold the underlying and sell a call against it to earn a little income, accepting a cap on your upside in return. Both are built from legs you already know, and both teach you how options and the underlying fit together on the same chart.

Two options that copy a future

Here is a small piece of market magic. Buy the 1320 call and, at the same strike, sell the 1320 put. Put those two together and the combined payoff is a single straight line that rises through 1320, identical in every way to simply being long one RELIANCE future. This is the long synthetic future.

The premiums are nearly equal at the at-the-money strike, so the structure goes on for close to zero net cost. Now think through why the line is straight.

• Above 1320, your long call gains rupee for rupee while the short put expires worthless. You make money exactly as a future would.
• Below 1320, your call expires worthless while the short put loses rupee for rupee, because you are obliged to buy at 1320 while the market trades lower. You lose money exactly as a future would.

There is no bend, no flat shelf, no kink at any strike. The call covers everything above 1320 and the put covers everything below it, and they hand off precisely at the strike.

The three numbers are the simplest in the whole course. The breakeven is 1320, the strike itself, because the structure cost nothing to enter. Above it your profit is unlimited, climbing with the stock. Below it your loss grows steadily and is about Rs 6,60,000 in the extreme case where RELIANCE fell all the way toward zero, which is just 1320 points on 500 shares. That figure is enormous, and it is the honest price of holding a future-like position.

Why would anyone build a future out of two options instead of just trading the future? Sometimes the synthetic is cheaper to finance, sometimes it lets you hold a position where only options trade conveniently, and sometimes it is one half of a more advanced structure. For a beginner the value is in the understanding: a call and a put at the same strike are not two separate bets, they are the two halves of one straight line.

Pairing an option with a holding

The synthetic shows options copying the underlying. The covered call shows options teaming up with it. Here you already own the underlying, a long RELIANCE future bought at 1320, or 500 shares you hold, and you sell a call against it to collect premium.

The sold 1360 call brings in about Rs 7,795. That cash is yours to keep no matter what happens next, and it does two useful things. It lowers your breakeven, and it pays you a small income for agreeing to a ceiling on your gains.

Walk the solid expiry line.

• Above 1360, your future keeps gaining but the call you sold loses an equal amount, so the two cancel and your profit stops rising. This is the cap. Your maximum profit is Rs 27,795, which is the 40 points your future gained from 1320 to 1360, worth Rs 20,000, plus the Rs 7,795 of premium you collected.
• Between 1304 and 1360, you are in profit. The future is up, the call expires worthless, and you keep its premium on top.
• At 1304 you break even. That is below your 1320 entry because the Rs 7,795 premium, about 16 rupees a share, cushions the first part of any fall.
• Below 1304, you are in a loss, and that loss is the large downside of the holding, softened only by the premium. In the extreme it is about Rs 6,52,000, the full value of the position less the credit you took in.

So the covered call trims a little off your downside and pays you a steady premium, in exchange for surrendering everything above 1360. If RELIANCE explodes to 1500, you do not enjoy that ride; your gains were sold away at 1360. The cap on the upside is the price of the income.

When each one earns its keep

These two structures suit very different moods, so match them to your view honestly.

• A long synthetic future is for a strong, outright bullish conviction where you want full participation and are prepared to carry the full downside. It is leverage, not insurance, so it belongs only to a position you have sized small enough to survive a deep fall.
• A covered call is for a mildly bullish to flat view on something you are happy to keep holding. You expect RELIANCE to drift sideways or up gently, not to rocket, so giving away the gains above 1360 feels like a fair trade for the Rs 7,795 of income and the slightly lower breakeven.

A useful way to see the contrast is what each does to your existing exposure. The synthetic creates exposure from nothing. The covered call takes exposure you already hold and tames its top end while collecting rent.

A few honest warnings keep both trades safe. The covered call does not protect you in a crash; below 1304 you bleed almost as fast as the bare holding, and the premium is small comfort against a big fall. If you want real downside protection, that is the job of a bought put, not a sold call. And never sell a call against shares you are unwilling to see capped, because the moment RELIANCE clears 1360 your further upside is gone.

You can lay both of these out in OpenAlgo's strategy builder, add the legs, and watch the combined line form. The synthetic snaps into a straight diagonal; the covered call shows its flat cap on the right and its long downward slope on the left. Rehearse them in sandbox trading (analyzer mode in OpenAlgo) so the shapes are familiar before any real money is involved. Next we build a structure with a genuinely surprising feature, a credit trade that cannot lose on the upside at all, the jade lizard.