Does Palantir Stock Make Your Bad Market Days Worse?

Palantir Technologies (PLTR) stock has climbed 10.0% over the last five trading days, while the S&P 500 rose 2.0%. A run like that invites you to chase it. But one week is not the question. The question is what Palantir does to your money when the market moves, because it travels further than the index both ways and further still on the way down.

How Far Does Palantir Carry Your Money When The Market Moves?

On days the S&P 500 rose over the past year, Palantir captured about 206% of the market’s gain. On days it fell, Palantir absorbed about 240% of the market’s loss. Both are one-year readings, and they can shift.

That makes Palantir leverage on the market, with the losing side the larger one. Over the past five years its annualized volatility was 67.0%, against 17.2% for the S&P 500. That is nearly four times the index’s swing.

Not all of that movement is the market’s. Over the same five years, Palantir’s daily returns tracked the index at a correlation of 0.54, so a good part of what it does is its own. A stock can magnify the market and still swing widely for reasons of its own.

Why Might Palantir Take More Of The Market’s Falls Than Its Gains?

The business is not the fragile part. Palantir earns an operating margin of 42.8%, against an S&P 500 median of 18.6%. Its revenue grew 78.9% over the trailing twelve months, against an S&P 500 median of 8.3%.

The fragile part is the price. Palantir trades at 74.8 times sales, while the S&P 500 median is 3.1 times. A price that far ahead of sales depends on growth like this lasting for years. That leaves little room for doubt, which fits a stock that has taken more of the market’s falls than its gains over the past year.

In Q2 2026, the U.S. accounted for over 81% of Palantir’s revenue, and U.S. commercial revenue growth accelerated as more companies bought the AIP platform to keep full ownership of their data, logic, and security. Management calls this AI sovereignty. That demand is what the price is counting on.

Has Palantir Paid You Enough For The Extra Swing?

Over five years, in raw return, yes. Palantir returned an annualized 46.4%, against 13.2% for the S&P 500.

At its Q2 2026 report in August, management raised its full-year 2026 revenue guidance midpoint to $8.154 billion. The Q3 2026 report is the next check on the growth the price assumes. A quarter that keeps Palantir on track for that guide, or raises it again, would support the price. A shortfall would land on a stock that already falls harder than the market.

So Is Palantir Worth A Place In Your Portfolio?

Harder to answer than it looks, because it depends on what you already hold. Does this add to the risk you are carrying or offset it? Does the extra return cover the extra swing? Is something else already doing the job better?

That is the sort of thinking behind a portfolio that beats the market, rather than one stock that might. Since its inception, our rule-based High Quality Portfolio has outperformed its benchmark, a blend of three major indices.

If you would rather see which stocks hold up when the market falls, our Drawdown Defenders screen ranks them. Knowing who falls less is not the same as knowing what to own.