Philadelphia Semiconductor Index Rises 5% as AMD, Marvell Gain More Than 8%

The Philadelphia Semiconductor Index climbed 5% in intraday trading Monday, Nov. 9, as chip shares advanced, with AMD and Marvell Technology each gaining more than 8% by 10:15 a.m. ET.

AMD and Marvell each gained more than 8%. Broadcom gained 7.6%, Arm rose more than 6%, and Micron Technology climbed 5.5%.

Together, the five stock moves showed strength across several semiconductor names during Monday’s U.S. session. Their gains ranged from 5.5% to more than 8%, with Micron recording the smallest listed advance and AMD and Marvell each gaining more than 8%.

The Philadelphia Semiconductor Index had gained 5% by 10:15 a.m. ET (15:15 UTC), reflecting a parallel rise in the index and the individual chip stocks. At that observation time, all five named companies had positive intraday changes, with the index’s move at the 5% mark. U.S. trading was underway Monday morning, Nov. 9.