Earnings roundup: STEC, Principal Financial

NEW YORK (AP) -Shares of STEC Inc. jumped to a 52-week high Monday after the memory chip maker posted strong first-quarter results and an outlook above Wall Street's expectations.

DES MOINES, Iowa (AP) -Principal Financial Group Inc.'s first-quarter earnings dropped sharply as volatile equity markets led to an investment loss and premium income fell, the insurer said Monday.

NEW YORK (AP) -Shares of HMS Holdings Corp., which provides cost recovery services to government health care programs, plunged Monday after the company's first-quarter profit fell short of Wall Street's expectations.

PHILADELPHIA (AP) -Hersha Hospitality Trust's first-quarter results improved as per-room revenue rose, the hotel operator said Monday.

NEW YORK (AP) -Shares of audio and television broadcast equipment supplier RRsat Global Communications Network Ltd. plunged Monday after the company missed analyst profit expectations.