Nifty Bull Put Spread: Valid Signal, Bad Week

First trade under the Nifty positional system. It lost ₹3,400.

Unlike the Sensex condor, I cannot pin this one on a stop that did not exist. The signal was valid, the strikes were correct, the expiry mapping was correct, and the exit came off the exit rule. The system did what it said it would do, and the system lost money.

That is a different kind of post-mortem, and honestly a more uncomfortable one.

The signal

Wednesday, 08-07-2026. On the Nifty 75-minute chart, the candle that closed at 10:30 closed above the 20 EMA with Supertrend green. That is the long signal, in full.

I entered on that close.

Expiry selection

Nifty weeklies expire Tuesday. The rule from the system doc: a signal on Wednesday, Thursday, or Friday takes the upcoming Tuesday expiry; a signal on Monday or Tuesday skips to the following week.

Wednesday signal → 14-07-2026 expiry. Six sessions of life in the option. Correct per the rule, and worth noting because it is the one part of this trade that later mattered a great deal.

The legs

One lot each.

• Net credit: 108.45 − 47.85 = 60.60 points → ₹3,939 (lot size 65)
• Spread width: 200 points
• Max loss: (200 − 60.60) × 65 = ₹9,061

So: risking ₹9,061 to make ₹3,939, on a roughly 40-delta short strike. The structure needs Nifty to hold up or drift, and it pays me for time while it does.

What happened

The same thing that happened to my condors, on the same day, for the same reason. Trump's ramblings, the market rolls over, and a 0.4 delta short put becomes a considerably higher delta short put in a hurry.

Supertrend flipped, the 75-min candle closed below the 20 EMA, and I exited on the signal.

Loss: ₹3,400. Backing that out, the spread had widened from 60.60 to roughly 113 points by the time I was out — about 52 points of damage on the combined position.

Post-mortem

What went right — and I want to say this plainly, because it is the point of having a system:

• The entry was a rule, not a view. I did not think Nifty looked strong. The 75-min candle closed above the 20 EMA with Supertrend green, so I took the trade.
• The exit was a rule, not a panic. Supertrend flipped red, the candle closed below the EMA, and I was out. I did not widen, I did not roll, I did not "give it room."
• The hedge did its job. Max loss was ₹9,061 and I lost ₹3,400 — 38% of the worst case. Naked, this was a much larger hole.

What went wrong that the system cannot fix:

An indicator on a 75-minute chart is a lagging function of price. It cannot know about a headline. By the time Supertrend flips, the move that triggered the flip has already happened — and I was short a put through the whole of it. This is not a bug I can patch; it is the definition of a trend-following exit. On a gappy, headline-driven day, the exit signal arrives after the damage.

I knew that. It is written into the design. But knowing it in the abstract on 01-07 and eating it on 08-07 are different experiences, and I would rather have the record show that.

What went wrong that I actually should have seen:

Here is the part that stings.

On 08-07 I was short a BankNifty condor, short a Sensex condor, and short a Nifty put spread, all at once. Three instruments. Three methodologies — one running off a clock, one off a combined-premium chart, one off an indicator on a 75-minute candle.

One position.

Every one of them was short premium. Every one of them was short volatility. When the market fell, they did not fail independently — they failed identically, because they were expressions of the same underlying bet: that nothing much would happen.

Total damage for the day: ₹1,200 + ₹2,400 + ₹3,400 = ₹7,000.

I wrote in the journal-opening post, on 01-07, that this exact thing would happen — that when a shock lands my positions would fail together, at the same hour, for the same cause, because underneath the different strikes and instruments they are all the same bet. I wrote it down, understood it, and then had zero mechanism to act on it. Diversification across strategies is not diversification across risk factors, and if you cannot state which risk factor a position loads onto, you do not know what you own.

Changes

1. Correlation check before entry. If this system fires a short put signal while I already have live, untested put wings elsewhere, that is not three trades — it is one trade at triple size. I need to either skip it, or accept it consciously and log that I did. Right now I am going to write the total exposure down and look at it before clicking. Nothing more sophisticated than that, but at least it will be visible.
2. Track net delta and net vega across the whole book, not P&L per system. The per-system view is exactly what hid this from me.
3. No change to this system's entry or exit rules. Sample size: one. Changing a system after a single loss is how you end up with no system at all. The rules were followed. I take the loss.

Running tally

Three trades, three losses, all closed on the same afternoon, and the journal is nine days old.

The Sensex loss was a process failure — I will fix that with an order type. This one was not. This one was the market charging me for a position I did not fully understand I was holding, and that is the more expensive lesson even though it is not the bigger number.

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.