At 10:47 AM Berlin time, someone made a statement with Micron. While the stock surged +12% to $646, put options at $600 strike exploded. Not because someone was betting against the rally. Because institutional investors were selling those puts — a bullish bet with full conviction.
What Happened
Micron Technology reported Q3 earnings the day before that surprised even optimists. AI memory demand is accelerating, HBM chips are sold out through 2027, and revenue is growing faster than expected. The stock responded with +12% — the biggest single-day gain since November 2024.
Between 10:47 AM and 12:34 PM, 5,300 put contracts with $600 strike and May 15 expiry traded hands. Volume was 36 times higher than prior open interest for that strike. The put strike sits 7% below the current price — deep enough to collect premium, but tight enough that only someone with conviction would take this position.
Implied volatility for Micron options stood at 63.6%, down 12% from the prior session. Translation: the market is calming down even as the stock rips higher. A classic sign that Smart Money doesn't expect big swings anymore — and is collecting premium instead.
The Options Side
When institutional investors massively sell put options, it's a bullish signal. They're committing to buy the stock at $600 if it falls there — but they don't believe it will. Instead, they pocket the option premium and wait for the contracts to expire worthless.
The call-put ratio for Micron on the day was 1.8:1 — significantly more calls than puts. But the most interesting flow came from the put side. The $600 puts weren't bought, they were shorted. You can see this in the volume-to-open-interest ratio: 5,300 contracts against only 147 existing positions = new short positions.
For comparison: the most active calls were at $645 strike (near spot) with only 23,583 contracts — far less spectacular. The real action was on the put side, where someone was willing to take on massive downside risk.
What Traders Are Watching Now
Micron sits at $646. Next resistance is $680 — the all-time high from March 2024. If the stock climbs there, many call holders will take profits. Below $600 it gets interesting: that's where a massive short put position now sits, acting as a buy cushion in a selloff.
Earnings are over, but the next catalyst is already visible: NVIDIA announces its next GPU generation in early June, and Micron is a key supplier for HBM3E memory. If NVIDIA raises demand forecasts, Micron benefits automatically.
Options markets currently price in a ±8% move through May 15. If you believe the rally continues, buy the $680 call for June. If you're more conservative, sell cash-secured puts at $600 — exactly what the institutions did today.
Disclaimer: This article is for informational purposes only and does not constitute investment advice. Past performance is not indicative of future results.