Palantir Technologies shares plunge in premarket trading on Tuesday after rallying more than 170% this year. The data-analysis software company raised its annual revenue outlook to $4.4 billion and outpaced analyst estimates for third-quarter sales. While analysts are broadly positive on the report, they flag concerns over the stock’s premium valuation. “We are in a nosebleed zone,” Palantir Chief Executive Officer Alex Karp said in an interview Monday. “No one else is here.” New Yorkers head