Taiwan Semiconductor (NYSE:TSM) just beat on sales and EPS – and the market sold it anyway.

The initial reaction was a 6% drop in pre-market, from $422 down to $397. The stock has since bounced and is holding just above $400. That bounce matters, because $400 isn’t just a round number – it’s the key gamma level that determines whether this stays contained or gets ugly.

I ran TSM through the implied move projections, option positioning, and price action to figure out what’s actually happening – and what it means for the broader AI trade heading into August and September.

Implied Move Projections for TSM

The daily implied move for today is 3.01%, which works out to roughly $12.33 in either direction from the open – putting the upside target around $418 and the downside around $397.

We came close to the upper barrier, touching $416 before pulling back. So far, the cash session is playing out inside the implied move – and the pre-market dip to $397 is looking like the lower bound for today.

The real question is whether option positioning can hold those barriers.

Option Positioning for TSM

Looking at the GammaLens data, $400 is the TGS (Top Gamma Strike). There’s very little call positioning above $420, and puts become dominant below $400.

That makes $400 the line in the sand. Lose it, and puts take control – volatility expands, and there’s nothing in the positioning below to slow a move down.

The fact that price hasn’t sold off aggressively is a signal in itself. Traders are willing to buy the dip, and option dealers will likely follow. My lean is that $397 to $400 holds as support in the short term – but with the rest of the AI complex selling off today, those lows could come under pressure.

Price Action on TSM – and What It Means for AI

On the weekly chart, TSM has posted three consecutive bearish closes and looks set to produce a fourth.

We haven’t had a weekly close below $397 since mid-April, so losing $400/$397 on a closing basis would likely trigger stops. Combined with the broader AI selloff today, this looks like deleveraging – but not panic. Rotation is happening – out of AI, semis, and memory, and into financials and healthcare – and that’s actually healthy. If everything were selling off together, that would be a different story.

The bigger picture: this weak response to a strong earnings report may signal that the AI trade is entering a harder stretch. Unless next week’s earnings can recover current losses, we could see more pressure in August and September. If the AI trade fades for the year, it’ll be worth watching what steps up to lead the index – because those names did a lot of heavy lifting on the upside.

The Trade

I’m staying cautious on TSM and the AI complex here. The $400 level is the pivot – I want to see it hold on a closing basis before getting constructive again. If it breaks, the next meaningful support is lower and the move could accelerate.

I’m live every Monday through Friday, 9am-2pm EST in the Benzinga Options School, covering TSM and the AI tickers moving heavily every day.