Ratio Back Spread, Synthetic and Range Forward

So far every bullish trade has had a neat, finite shape. Now we step up in ambition with three structures that trade those tidy caps for something larger and more open-ended, and in two cases far more dangerous. They are all bullish, but each expresses the view differently. The call ratio back spread keeps your downside small while leaving the upside wide open. The long synthetic future turns two options into a straight line that behaves exactly like buying a NIFTY future. The range forward is a bullish collar that mostly sleeps until NIFTY makes a real move. These are the trades where the strategy builder's numbers earn their keep, because the shapes are no longer obvious from the name. All figures use real NIFTY data captured on 26 June 2026, spot 24,056, lot 65, the 28 July 2026 expiry about 32 days away.

The one-line idea

All three structures reach for an unlimited upside, but they pay for it in completely different ways. One caps its loss tightly and risks only a modest sum. The other two rebuild a futures position out of options, so their downside is open and their margin is heavy. The skill this chapter teaches is reading which side of the chart hides the unlimited, or near unlimited, loss.

Strategy one: the call ratio back spread

A back spread uses an unequal number of legs. Here you sell one at-the-money call and buy two calls one strike higher.

Leg	Action	Strike	Premium per share	Cash flow per lot of 65
1	Sell 1 call	24,050	425.8 received	plus Rs 27,677 in
2	Buy 2 calls	24,150	370.1 paid each	Rs 48,107 out (2 lots)
			Net debit	Rs 20,430 out

The single sold call funds part of the two you buy, but the pair costs more in total, so you pay a net debit of Rs 20,430. In return you own one extra long call above the strike, and that spare call is what gives the structure its unlimited upside on a strong rally.

The three numbers fall out as follows.

Maximum loss is Rs 26,930, and it lives in the middle, not the tails. Below 24,050 every call expires worthless and you simply lose the net debit. The real pain sits at the 24,150 strike, where the sold call is fully in the money by 100 points but the two bought calls have barely woken. That is the 100-point loss on the short, worth Rs 6,500, plus the Rs 20,430 debit, which together make Rs 26,930.

Breakeven is 24,564. Above 24,150 the two long calls gain twice as fast as the single short loses, a net one point per share, so the position climbs out of its valley and crosses zero once that gain recovers the debit per share. Maximum profit is unlimited above there.

Number	How it is built	This trade
Max loss	short call loss at 24,150 plus net debit	Rs 6,500 plus Rs 20,430 equals Rs 26,930
Max profit	one spare long call running free	Unlimited
Breakeven	upper crossing where two longs recover the debit	24,564

Now settle it at expiry. The sold call is worth max(NIFTY minus 24,050, 0); the two bought calls are each worth max(NIFTY minus 24,150, 0).

NIFTY at expiry	24,050 call sold	24,150 calls bought (each)	Net profit or loss
23,900	worth 0	worth 0	minus Rs 20,430 (the debit)
24,150	worth 100	worth 0	minus Rs 26,930 (max loss)
24,564	worth 514	worth 414	about Rs 0 (breakeven)
24,800	worth 750	worth 650	plus Rs 15,320
25,050	worth 1,000	worth 900	plus Rs 31,570 (and rising)

Read down and the valley shows itself. The worst case is not a crash but a mild drift up that pins the sold strike at 24,150. This is the rare structure where unlimited means unlimited profit, not unlimited risk, and the loss is a defined Rs 26,930.

Strategy two: the long synthetic future

The next structure abandons curves entirely. By combining one bought call and one sold put at the same strike, you build a straight diagonal line that rises and falls exactly like owning a NIFTY future.

Leg	Action	Strike	Premium per share	Cash flow per lot of 65
1	Buy call	24,050	425.8 paid	Rs 27,677 out
2	Sell put	24,050	295.1 received	plus Rs 19,182 in
			Net debit	Rs 8,496 out

The bought call hands you all the upside of a future; the sold put hands you all of its downside. Together they cost a small net debit of Rs 8,496, and the position then tracks NIFTY point for point in both directions. There is no protective leg anywhere, so there is no flat floor. This is a whole future, rebuilt from two options.

Maximum profit is unlimited above the breakeven. Maximum loss runs toward zero, about Rs 1,571,746, because below the breakeven the position falls rupee for rupee just like a long future. Breakeven is 24,181, the strike plus the net debit per share of 130.7, which is the effective price at which you bought NIFTY.

Number	How it is built	This trade
Max profit	future-like, no ceiling above breakeven	Unlimited
Max loss	future-like fall toward zero	about Rs 1,571,746
Breakeven	strike plus net debit per share	24,050 plus 130.7 equals 24,181

NIFTY at expiry	24,050 call bought	24,050 put sold	Net profit or loss
23,000	worth 0	worth 1,050	minus Rs 76,746 (and falling)
24,050	worth 0	worth 0	minus Rs 8,496
24,181	worth 131	worth 0	about Rs 0 (breakeven)
24,500	worth 450	worth 0	plus Rs 20,755
25,000	worth 950	worth 0	plus Rs 53,255 (and rising)

There is nothing to interpret in the line, which is the point. Above 24,181 you gain point for point with no ceiling; below it you lose point for point with no floor.

Strategy three: the range forward

The third structure is gentler. A range forward, sometimes called a bullish collar, sells an out-of-the-money put below the market to fund an out-of-the-money call above it.

Leg	Action	Strike	Premium per share	Cash flow per lot of 65
1	Sell put	23,950	256.6 received	plus Rs 16,679 in
2	Buy call	24,150	370.1 paid	Rs 24,057 out
			Net debit	Rs 7,378 out

The sold put pays for most of the bought call, leaving a small net debit of Rs 7,378. Between the two strikes, from 23,950 to 24,150, neither option has intrinsic value, so the position rests on that small debit, a flat dead zone where little happens. Outside the strikes it springs to life: above 24,150 the bought call gives unlimited upside, below 23,950 the sold put hands you a future-like downside.

Maximum profit is unlimited above the breakeven. Maximum loss runs toward zero, about Rs 1,564,128, on the naked put. Breakeven is 24,264, the upper strike of 24,150 plus the net debit per share of 113.5.

Number	How it is built	This trade
Max profit	bought call running free above the upper strike	Unlimited
Max loss	sold put falling toward zero	about Rs 1,564,128
Breakeven	upper strike plus net debit per share	24,150 plus 113.5 equals 24,264

NIFTY at expiry	23,950 put sold	24,150 call bought	Net profit or loss
23,000	worth 950	worth 0	minus Rs 69,128 (and falling)
24,000	worth 0	worth 0	minus Rs 7,378 (the dead zone)
24,264	worth 0	worth 114	about Rs 0 (breakeven)
24,600	worth 0	worth 450	plus Rs 21,873
25,100	worth 0	worth 950	plus Rs 54,373 (and rising)

The dead zone between the strikes makes the trade feel calm, but that calm ends the instant NIFTY drops through 23,950, where the sold put begins losing rupee for rupee with no floor.

Your odds across the three

The probability of profit ranks these cleanly: about 28 percent for the call ratio back spread, 44 percent for the synthetic future, and 40 percent for the range forward. The back spread sits lowest because NIFTY must clear 24,564, beyond the plus one sigma band on its chart, before the open-ended upside pays. The synthetic and the range forward are close to even because they behave like a future, profiting on any move past a breakeven only a little above spot.

Margin

Margin sorts these three by danger more honestly than any other number. The call ratio back spread ties up about Rs 52,256, modest, because its loss is defined and the long calls largely cover the short. The long synthetic future blocks about Rs 173,537 and the range forward about Rs 166,553, both heavy, because each carries a naked short leg with an open downside the exchange must cover.

Return on margin only makes sense when the profit is capped, and two of these have no ceiling, so there is no fixed yield to quote. The takeaway is the contrast itself: roughly Rs 52,000 of margin for a defined-risk shape, against roughly Rs 1.7 lakh for a future in disguise.

Time decay

The three sit differently against the clock. The call ratio back spread is a net buyer of options, long one extra call, so time decay works gently against it: its blue T+0 line floats above the orange expiry line, and the valley deepens slightly as 28 July nears. The long synthetic future holds almost no time value at all, so its T+0 line lies right on the expiry line; it is essentially time-neutral, like a future. The range forward sits close to neutral too, with only a small bleed on its long call. None of these is a decay trade. They live or die by direction.

Three shapes, one bullish family

Strategy	Max loss	Max profit	Breakeven	Margin
Call ratio back spread	Rs 26,930	Unlimited	24,564	Rs 52,256
Long synthetic future	about Rs 1,571,746	Unlimited	24,181	Rs 173,537
Range forward	about Rs 1,564,128	Unlimited	24,264	Rs 166,553

Read the maximum loss column carefully, because it sorts these by danger. The call ratio back spread is the only one a beginner should reach for: its worst case is a defined Rs 26,930 and it asks for modest margin. The synthetic future and the range forward each carry a naked short leg, a downside well over fifteen lakh, and heavy margin, because each is really a future wearing an options costume.

Key takeaways

• All three are bullish with an unlimited upside, but they differ entirely in what they risk to reach it.
• The call ratio back spread has a defined max loss of Rs 26,930 that sits in the middle at the 24,150 strike, not in the tails, and runs free above the breakeven of 24,564. It is the beginner-safe choice here.
• The long synthetic future equals a long NIFTY future: breakeven 24,181, a near six-figure-times-ten downside toward Rs 1,571,746, heavy margin, and almost no time decay.
• The range forward is a bullish collar with a flat dead zone between the strikes, but the sold put leaves a future-like downside near Rs 1,564,128 below 23,950.
• Margin tells the truth: about Rs 52,000 for the defined-risk back spread, against roughly Rs 1.7 lakh for the two future-like structures.
• Always check which side of the chart hides the unlimited, or near unlimited, loss before being drawn in by the unlimited profit.