Microsoft closed at $510.12, up 2.68%.

Options flow showed pronounced bullish conviction, led by a $51.13 million deep in-the-money call buy at the $420.00 strike expiring in 2026. A second large trade established a $2.84 million net-credit bull put spread using the $510.00 and $420.00 puts for 2026-12-18. The combination of aggressive long-dated upside participation and premium-collecting, risk-defined bullish exposure points to institutional positioning for continued resilience rather than a bearish reversal.

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Options Indicators

MSFT’s implied volatility is 26.10%, and with an IV percentile of 28.97%, current option pricing sits on the lower end of its recent range, suggesting volatility is relatively subdued and options are cheaply priced rather than rich. The IV/HV ratio of 1.30 indicates implied volatility is running above historical volatility, so while premiums are still inexpensive in percentile terms, the market is assigning somewhat higher forward-looking volatility than what has been realized recently. The Call/Put volume ratio is 2.21, reinforcing the demand skew toward calls.

Large Trades

A CALL buy worth $51.13 million was the single largest large trade of the day, with 5,000 contracts bought at the $420.00 strike expiring on 2026-11-20. With MSFT referenced at $510.12, this call was already in the money at execution, which makes it a high-conviction bullish position rather than a cheap lottery-style upside chase. The buyer paid a substantial premium to secure long-dated upside exposure, signaling expectations that MSFT can hold its strength and potentially extend higher over time.

A bull put spread entered for a net credit of $2.84 million was the other standout trade, built by selling 1,200 contracts of the 2026-12-18 $510.00 put and buying 1,200 contracts of the 2026-12-18 $420.00 put. This is a classic put spread strategy that expresses a moderately bullish view while defining downside risk: the trader collects premium upfront and benefits if MSFT stays above the short put area into expiration, with the long lower-strike put serving as protection against a deeper decline. Overall, the large-trade flow is clearly bullish, as both displayed trades lean positive and the positioning combines aggressive upside participation through a deep in-the-money long call with premium-collecting, risk-defined bullish spread exposure. Taken together, the order flow suggests institutional traders are positioning for continued resilience and upside in MSFT rather than preparing for a meaningful bearish reversal.

Strategy Reference

For a lower assignment probability, a put seller could consider strikes near the $420.00 long-put wing, but more practical low-capital ideas include selling out-of-the-money puts below $380.00 or using a smaller bull put spread like the $470.00/$420.00 structure to reduce margin while maintaining a bullish posture aligned with the institutional flow.