What's coming, and why it moves your market

Concentrated open interest at particular strikes exerts a pull on the index into settlement — the 'pinning' effect — because option writers hedge toward the strikes where their exposure is largest. Intraday volatility rises, especially in the closing hour.

The index tends to gravitate toward heavy-OI strikes and max pain into the close. Rollover data shows whether positions are being carried into the next series and with what bias. Stocks approaching market-wide position limits get erratic, because fresh positions are blocked and only unwinding is permitted.

• Rollover percentage versus the three-month average — how much conviction is being carried forward
• Where the heaviest call and put OI sits relative to spot
• Whether any of your names are entering the ban list

The repo rate is the price of money in India. It sets the floor under every lending rate in the system, so it reaches bank margins, corporate borrowing costs and household EMIs. In practice the commentary moves markets more often than the number does — the rate itself is usually well anticipated, the stance and the projections are not.

Bond yields react first, within seconds. Equities follow as the market re-prices borrowing costs: banks and NBFCs re-rate on expected net interest margin, and anything sold on credit — cars, homes, consumer durables — re-rates on expected demand. Liquidity measures like CRR changes can matter more to banks than the headline rate.

• The stance — accommodative, neutral, or withdrawal of accommodation
• Inflation and GDP projections, and whether they were revised
• Liquidity measures (CRR, OMO) alongside the rate decision
• Whether the vote was unanimous or split

Between Fed meetings, this is the single largest input into where the market thinks US rates are heading. It moves rate expectations, and rate expectations move flows into India.

A hot jobs number pushes rate-cut expectations further out, lifts the dollar and tightens conditions for emerging markets. A weak number does the reverse. The effect on India is second-order — it arrives through the Fed path and the dollar rather than through anything domestic — which also means it fades faster than a domestic event.

• Average hourly earnings — the wage-inflation read often matters more than the headline count
• Revisions to the prior two months, which can invert the headline's message
• The gap between the household and establishment surveys