The data-mining giant just dropped below its debut stock price of $10. Palantir Technologies'(PLTR $Palantir Technologies Inc.(PLTR)$ )stock sank 21% to an all-time low on May 9 after the analytics firm posted its first-quarter earnings report. Revenue rose 31% year over year to $446 million, which exceeded analysts' estimates by $2.5 million. However, adjusted net income declined 46% to $45 million, or $0.02 per share, which missed analysts' expectations by $0.02. On a generally accepted accounting principles (GAAP) basis, the company's net loss narrowed from $123 million to $101 million. In the second quarter, Palantir expects revenue to grow about 25% year over year to $470 million -- which missed the consensus forecast for 29% growth and wou