Dose Of Reality. Please click here for an enlarged chart of AI software company Palantir Technologies Inc (PLTR). Note the fo

Palantir (NASDAQ: PLTR) stock is getting hit with another day of substantial sell-offs in Thursday's trading. Palantir's valuation is retreating today after Walmart issued sales guidance for this year that spooked Wall Street.

Thanks to a very disappointing University of Michigan consumer sentiment report last Friday, the markets ended the week on a sour note. To review, the report showed a reading of 64.7, down from 71.7 in January – a 10% decline.

Related: Walmart, Booking.com will rock markets in a busy earnings week But there was probably more behind the selling, including that Palantir's shares had become way too pricey and were vulnerable to a selloff.

As two of the market's top performers in recent years, investors may be wondering if they should buy the dip in Palantir Technologies (PLTR) or Vertiv Holdings (VRT) stock.

The software company's share price was down 9.4% as of 1:45 p.m. ET amid a 0.8% decline for both the S&P 500 (SNPINDEX: ^GSPC) and Nasdaq Composite (NASDAQINDEX: ^IXIC). BigBear.ai's valuation is tumbling today in conjunction with a sell-off in the broader market triggered by concerning guidance from Walmart.

Shares of highflying AI darling Palantir Technologies Inc. saw their losses deepen on Thursday after a report touting planned budget cuts at the Defense Department sent the stock reeling on Wednesday afternoon.

Wall Street is retreating from its record as a slide for Walmart weighs on U.S. stock indexes. The S&P 500 fell 0.7% Thursday.