Friday's Plunge: A Dip to Buy or the Setup for a Black Monday?

On Friday, the S&P 500 and Nasdaq posted one of the biggest single-day drops we've seen in years — and the pain landed hardest on exactly the stuff that had been red hot lately: tech and semiconductors.

The question flooding my inbox boils down to one thing: is this the dip to buy, or the setup for a Black Monday-style panic?

The stats lean slightly toward a bounce

Here's my read up front: history weakly supports a bounce. When I ran the scenario through a backtest, I found 199 occurrences where the S&P 500 fell 2% or more in a single day. The average one-day return afterward was actually positive, and the 1-week, 1-month, 6-month, and 12-month averages all looked constructive too.

There's one caveat I won't bury, though. When the days are red, they are often very red. A big drop followed by more big drops is how volatility clusters — it can turn violent to the downside all at once. So the honest takeaway isn't "definitely a bounce." It's a soft suggestion that, using history as a guide, a bounce is a bit more likely than not.

The put-call ratio flashed a contrarian signal

Crowd sentiment briefly freaked out on Friday. The S&P 500 put-call ratio showed a sharp surge in put volume.

I use that as a contrarian signal. When the put-call ratio lurches one way, my skepticism rises in the other direction. On Friday, a flood of put demand came in betting this thing rolls lower. What usually happens when everyone rushes the puts is a bounce that crushes those puts, forcing people to cover. If a real rollover is coming, it typically arrives after that kind of washout bounce — not in the middle of the panic.

But I don't worship the V-shaped recovery

This market has trained people — me included — to look at every large drop and shrug, "it'll probably bounce." For the last several years, the V-shaped recovery has been nearly undefeated.

That's exactly what makes it dangerous. We've lived through one of the most impressive bull markets in U.S. history for going on a decade and a half, and as a group we've all but forgotten what a true bear market feels like — one that lasts more than 18 months or carves out more than a 30% drawdown. Even COVID was a 35% drop, but it recovered so fast that the memory of a suspended bear market — like 2008, where it took roughly 2,000 days just to get back to break-even — has faded.

My personal conclusion: given the stats and the still-feverish demand for stocks, the most likely scenario is a bounce. But with SpaceX's S&P 500 inclusion pushed back, the hype around its rumored $2 trillion IPO draining out, and a strong jobs report stoking rate fears, I'm sitting in cash on some portfolios and waiting for a bigger dip to build positions.

FAQ

Q: If the stats are positive after a 2% drop, shouldn't I just buy? A: The average is positive, but baked into that average are the cases where a big drop clustered into much bigger drops. An average doesn't guarantee safety on any single occurrence.

Q: Why read a put-call spike as bullish? A: Because when everyone crowds one side, the opposite tends to follow. Not always — but often enough to be worth respecting.