Nifty 0DTE, 14-07: The Straddle That Cost Nothing

Second trade in the 0DTE series, first one in Nifty. Structure and reasoning are in the original write-up; the Sensex version from the 9th is here.

Profit: ₹4,472.

But the number I actually want to talk about is the entry cost.

Zero

• Debit paid: 58.35 + 70.95 = 129.30
• Credit received: 3 × (19.90 + 23.20) = 3 × 43.10 = 129.30
• Net: 0.00

Not "roughly zero". Exactly zero, to the paisa. I bought an at-the-money Nifty straddle on expiry day and the three strangles I sold against it paid for it precisely.

I did not engineer that. It fell out of the strike selection — the ratio and the strike distances were chosen the same way they always are, and the chain happened to price them to a wash. But it is worth sitting with, because it changes what the payoff diagram means.

The tent, when the tent is free

With no debit there is no notch at the pivot. If Nifty had settled dead on 24,150 the whole structure expires worthless and I lose exactly nothing — brokerage and taxes aside, which are not nothing, but are not a market loss either.

Anywhere in the 375-point band from 23,925 to 24,300, the position makes money. Outside it, the two net short lots per side take over and the loss runs at 2× the index.

So the honest description of what I owned: a free lottery ticket on a 375-point band, funded by writing an uncapped tail on both sides. That framing is much closer to the truth than "a zero-cost trade".

The result

₹4,472 on a lot of 75 is 59.63 points. With a zero net debit, that maps directly to the index sitting about 60 points from the 24,150 pivot when I came off — 24,210 or 24,090, both identical on this payoff.

Sixty points on Nifty is 0.25%. That is all the day needed to give me, and it is a fraction of the 375-point band the structure could have used.

Against the peaks: 60% of what the call side would have paid at 24,250, 40% of the put side at 24,000. Nifty moved about a quarter of a percent and I collected ₹4,472. That is the entire attraction of this structure and also, I suspect, the reason it will eventually bite.

Why 'free' is the wrong word

Three costs that do not appear anywhere in the net debit line.

Margin. Four short lots against two long ones. The exchange does not care that my cash outlay was zero; SPAN and exposure margin were blocked from entry to exit. On a return-on-capital basis this trade is nowhere near as spectacular as ₹4,472 on ₹0 suggests, and quoting it that way would be the sort of thing I write this journal to avoid.

Costs. Six lots across four legs, in and out. Brokerage, STT on the short side at expiry, exchange charges, stamp duty. On a zero-debit structure these are the only guaranteed outflow in the whole trade.

The tail. Beyond 24,300 or below 23,925, I am short 2 net lots on expiry day. Nifty gapping or trending 200 points past a breakeven in the last hour is not exotic — it happened on 08-07 in a much larger way. The structure has no wing behind the wing. Zero cost, uncapped risk. Those two facts live in the same position and only one of them is on the contract note.

The pattern I am starting to notice

Two trades in, in both cases the short put has been placed further from the pivot than the short call: 500 vs 400 in Sensex on the 9th, 150 vs 100 here. Puts are richer — the same skew I keep running into on the condors — so keeping the credit balanced against the straddle pushes the put side out.

The consequence is that the tent is not symmetric. Here the downside gave me 150 points of peak against 100 on the upside, and 225 points of room below the pivot against 150 above. The structure quietly prefers a fall. I did not decide that. The option chain decided it, and I have been accepting the output without writing down that I accept it.

That is the same failure mode as the BankNifty condor's asymmetric wings. Delta and price-driven strike selection produces a directional lean, and if I never name the lean I will eventually mistake it for edge.

Where the series stands

Two trades, two wins, still no information about the only scenario that matters.

Disclaimer

This is a personal trading journal. It is a record of my own trades, my own money and my own mistakes — nothing more.

Nothing here is a trade recommendation, a tip, a call, or advice of any kind. I am not a registered adviser and I am not qualified to tell anyone what to do with their capital. The strikes, premiums, entries and exits above are what I did, not what you should do.

If you read this blog and place a trade because of it, that trade is yours. I accept no responsibility for anyone else's losses. Do your own research, size for your own risk, and understand that options can lose you more, faster, than you expect.