Intel (INTC) fell by 26%, a drop not seen since the Y2K bubble popped 24 years ago. The stock’s chances of holding the $21 level are high. Markets are discounting Intel’s weak guidance. The firm may beat expectations after it refreshes its CPU chips in the PC market in October.Intel dragged Arm (ARM), ON Semiconductor (ON), and Broadcom (AVGO) lower last week. Those stocks are on sale, although relative valuations are still unfavorable.Shares of social networking firm Snap (SNAP) are on sale. The stock lost 27% in value after posting a two-cent non-GAAP EPS. Revenue grew by 15.9% Y/Y to $1.24…