Philadelphia Semiconductor Index Retreats After Earlier 5% Surge

July 31st, according to BIT (bit.com) market data, the Philadelphia Semiconductor Index reversed its gains after an earlier increase of about 5%. Sandisk (SNDK.O) fell by about 7%, Micron Technology (MU.O) dropped by over 4%, and SK Hynix (SKHY.O) fell by more than 2%.