I was about to enter an iron condor on NIFTY. The payoff chart looked perfect — max profit ₹10,890, max loss ₹4,110. Risk-reward of 2.65:1. Easy money, right?
Then I checked the Greeks in Strategy Lab.
The warning signs
Vega was -487. The tip said: "Rising IV hurts. Benefits from volatility crush." I checked the calendar — RBI monetary policy was in 3 days. IV typically spikes before RBI announcements. My short vega position would lose ₹487 for every 1% IV increase. If IV jumped 5%, I'd lose ₹2,435 before the stock even moved.
Gamma was -0.030. The tip said: "Negative gamma. Large moves hurt this position." With a central bank event coming, a 300+ point NIFTY move was plausible. The iron condor would get destroyed.
What I did instead
I waited. RBI announced a surprise rate cut. NIFTY gapped up 280 points. IV crushed from 16% to 11%. If I had entered the iron condor, both my short call legs would have been breached. Estimated loss: ₹38,000-42,000.
Two days after the event, with IV crushed and NIFTY settled, I entered the same iron condor at better premiums. Theta was now even higher (faster time decay post-event), and vega risk was minimal.
Greeks aren't just academic. They're the difference between a profitable trade and a ₹40,000 loss.
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