US memory chip stocks strengthen pre-market, SanDisk (SNDK.O) up 3.5%

According to data from msx.com, US memory chip stocks strengthened in pre-market trading. SanDisk (SNDK.O) rose 3.5%, Micron Technology (MU.O) rose 5.2%, Western Digital (WDC.O) rose 3.5%, and Seagate Technology (STX.O) rose 2.9%.