The Micron Technology offices in San Jose, California, Dec. 16, 2025. David Paul Morris | Bloomberg | Getty Images Micron Technology shares caught fire this week amid a global shortage of memory chips, with momentum driving the stock on surging enthusiasm across the semiconductor sector. Shares were up almost 14% to $734 in trading on Friday as of 2:20 p.m. ET. The stock has gained about 35% on the week and more than 80% in the past month. Micron is on track for its best week since December 2008, when it was trading below $5 a share in the wake of the Great Recession. The company's market cap is currently above $820 billion, according to LSEG. Stock Chart Icon Stock chart icon Micron Technology in the past five days Micron isn't alone among the chipmakers . Shares of AMD were up 24% on the week as the company's market cap crossed the $700 billion threshold. Intel has jumped 24% on the week and has more than doubled over the past month in a widely touted comeback for the CPU maker.…