Weekly F&O Context — Sunday, 31 May 2026

Week of 31 May 2026 — First Hour Playbook

The opening hour sets the tone but rarely the direction. Treat the first 60 minutes as data collection, not entry signal.

What to watch before committing

• Gap behaviour: A gap that fills within 15 minutes usually means mean-reversion is dominant. A gap that holds and extends suggests trend-day potential.
• Opening range width: Compare the 9:15–10:15 range against the prior five-session average. A noticeably tight opening range often precedes a breakout later; a wide one suggests the day's range may already be half-spent.
• Pivot reaction: Pull the daily levels from the pivot calculator before the open. Note whether price respects the central pivot, drifts toward R1/S1, or breaks through on volume. Repeated rejections at the same level matter more than the level itself.
• VIX direction: A rising VIX into a flat market typically warns of an afternoon move. A falling VIX through the open favours range-bound behaviour.
• Bank Nifty lead: If Bank Nifty is trading directionally while Nifty drifts, the index usually follows within the hour.

Range day vs trend day cues

Trend days typically print at least 60% of the eventual range in the first hour and close near the extreme. If by 10:15 the index is mid-range with overlapping 5-minute candles, position sizing should assume mean-reversion. If the first hour closes at or near its high/low with expanding candles, fade trades carry asymmetric risk.

Event risk this week: monitor any month-end expiry rollovers and global cues from Friday's US close before pre-market.