Advanced Micro Devices (AMD) - Get Report was down 5.8% in midafternoon as bad news from TriQuint (TQNT) dragged the chipmakers lower.


(INTC) - Get Report

was down 1.6%,


(MU) - Get Report

was down 2.9% and

Texas Instruments

(TXN) - Get Report

was down 4%. The

Semiconductor Index


was down 1.6%.

TriQuint's profit warning comes on top of Tuesday's report from

Semiconductor Equipment and Materials International

indicating that the slowdown in equipment orders in April was worse than had been anticipated.