Before you call, check out the companies that are making headlines. Apple – Apple shares fell less than 1% after Reuters reported the tech giant was introducing aggressive discounts on its iPhones in China. Micron Technology – Shares rose 2.3% after Morgan Stanley upgraded the semiconductor company to equal weight due to underweight. The bank said it underestimated the economic and narrative elements of artificial intelligence memory. Micron shares are up nearly 47% this year. Nvidia – Chipmaker shares added 1.4% as they prepare for a closely watched quarterly report later this week. Several companies have raised their price targets on Nvidia, including Barclays and Stifel. Li Auto – U.S. shares of the Chinese electric vehicle maker fell 4.3%. Lee reported weaker-than-expected first-quarter earnings and soft earnings guidance for the current quarter. GameStop, AMC Entertainment — Shares of GameStop and AMC Entertainment faltered during pre-market trading after volatile gains last week amid renewed trading in meme stocks. Johnson Controls – Shares rose 5% after Bloomberg News reported that Elliott Management had taken a stake in the safety and security company worth more than $1 billion. The stock is up 19% year to date. Teradyne – Semiconductor testing equipment inventories rose nearly 3%. Goldman Sachs upgraded Teradyne to buy, citing its recent strong quarter and expectations for a “cyclical recovery” in its system-on-chip testing business. — CNBC’s Alex Harring and Michelle Fox contributed reporting.