In pre-market trading on the US stock market, memory chip concept stocks experienced a collective upswing, building on the momentum from the previous day's gains. Notably, SanDisk's stock soared by over 4%, while Micron Technology, Western Digital, and Seagate Technology each saw their shares climb more than 1%. Meanwhile, Silicon Motion, SK Hynix, and Rambus witnessed more modest increases, with their shares rising by less than 1%.