The Tanmay Edge | India's pre-market edge, every trading day.
Today the Sensex week settles — expiry day — and by this afternoon every Sensex option either pays off or expires worthless. That's job one. The shadow behind it is the Reserve Bank's rate verdict tomorrow, which is why nobody wants to carry a big bet into the close. This episode is the data-driven plan for trading the expiry with one eye on the RBI. Start with the Sensex, because it dies today. The range is 74000 to 75000 — the heaviest downside bets at 74000, the heaviest upside lid at 75000. The option market is pricing a roughly 650 point move (the straddle), and on expiry, price gets dragged toward the middle, around 74300 to 74500, where the most option buyers lose. One warning: Sensex option volatility crushes into the close, so buying them for direction in a quiet tape can cost you half your premium to time decay alone. On expiry, the seller usually wins. The Nifty is the cleaner trade because it still carries tomorrow's event. It closed at 23405, with the option market pricing about a 375 point weekly move — a band of roughly 22940 to 23875. Three levels run the day: 23300 support (the heaviest downside protection), 23500 resistance (almost 3 million fresh upside contracts piled on yesterday — a hard lid), and 23450 as the switch. Below 23450 moves get amplified; above it, the market calms and drifts. We're sitting just below it. The plan: while 23300 holds on a closing basis, buy the dips at 23300 to 23330 with a stop under 23250. Only trust the upside above 23450; until then, sell into 23500. Lose 23300 on a close and 23200 is next — the tell that the market is pre-positioning for a bad rate call. The volatility trade is already paying. A couple of sessions ago I flagged this as a long-volatility setup — buy the strangle, don't sell options. India VIX closed at 16.28, up 6 percent in a day. Volatility stays bid into a big event and crushes after, so on the Nifty you stay long vol or flat — you don't sell premium the day before the RBI. The positioning is the real tell. In index futures the foreign investors are net short 259253 contracts and added almost 29000 shorts yesterday — their most defensive stance all week. Retail is net long almost 196000; the pros are slightly long and writing options. Big money hedged, the crowd long, into the verdict. In cash, foreigners sold another 5336 crore but domestic institutions bought 5510 crore — a sixth straight buying day, the wall that held the index Wednesday when IT fell over 5 percent, led lower by TCS, and the banks rotated up to catch it. The backdrop: GIFT Nifty near 23313, about 90 lower; Asia red; US lower overnight. Crude spiked toward 98 on US-Iran tensions earlier this week but cooled to under 97 this morning; gold firm at 4466; rupee 95.71; the 10 year bond steady at 7.02; Bitcoin under 70000. The two things that could box in the RBI — runaway crude and spiking yields — have both gone quiet. The market expects the rate held at 5.25 percent tomorrow, with a cautious tone. Tag for the day: expiry pin, range-bound, long-volatility — support 23300, resistance 23500, conviction capped until the verdict. Stream every episode free on rupeecase.com [http://rupeecase.com]. Data sources: NSE, BSE, NSDL, RBI
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