By STAN CHOE
AP Business Writer
NEW YORK (AP) — After years of screaming higher, almost regardless of what the economy was doing, tech-oriented stocks are tanking and dragging down the rest of Wall Street. Many of these high-profile companies still make billions of dollars in profits, and they continue to dominate the top of the rankings for most valuable businesses. But two big changes have caused their stocks to come sharply back to Earth this year: Interest rates are rising, and expectations for continued fast growth suddenly look much more shaky.