The Nasdaq and S&P 500 fell on Tuesday, renewing concerns over whether sky-high tech valuations are sustainable.

Dow Jones futures were little changed after hours, along with S&P 500 futures and Nasdaq futures.The stock market rally technically was mixed Tuesday, with the Dow eking out a tiny gain. The Nasdaq ...

Wall Street is edging lower following drops for Palantir and other stars that had been riding the mania surrounding ...