MU, SNDK, STX, and WDC are described as vulnerable to recurring memory-efficiency and capacity headlines; the post says STX and WDC fell 20% last week after Toshiba announced increased HDD manufacturing capacity. The image shows SKHY down 3.96%, STX down 3.20%, WDC down 2.60%, MU down 3.60%, and SNDK down 6.52%.