Micron Technology's stock is directly impacted by its own performance report. The company's earnings exceeded expectations and it provided strong guidance for the future, which are key drivers for stock price appreciation. This reflects positively on Micron's operational efficiency and market demand for its products.

Western Digital's stock is positively impacted by Micron's performance as both companies operate within the tech and semiconductor industry. Micron's better-than-expected earnings and strong guidance suggest a healthy sector environment, which investors may interpret as a positive indicator for Western Digital as well.