Retail traders pile into memory chipmakers as AI boom squeezes supplies, lifts prices

Industry Overview - Retail investors have significantly increased their purchases of U.S. memory and data storage chipmakers in January 2026, driven by expectations of rising prices due to booming artificial intelligence infrastructure demand and a global shortage of memory chips [1] - The memory chip shortage is described as "unprecedented" by Samsung's co-CEO TM Roh, with industry rivals warning that supply constraints may last for months or even years as AI infrastructure continues to consume available supplies [2] Company Performance - SanDisk has experienced a remarkable surge in its stock price, rising approximately 65% in 2026, with over $7.1 million in retail inflows recorded in a single day, marking the largest one-day move on record [2] - Western Digital has attracted nearly $10 million in inflows in the first two weeks of January 2026, indicating a strong monthly performance, while Seagate Technology has seen over $2.1 million in inflows this year [3] - Micron Technology, one of the leading memory makers, has increased by 18% in 2026 after a substantial rise of 240% in 2025, highlighting its strong market position alongside Samsung and SK Hynix [4] Retail Investor Trends - In 2025, U.S. retail inflows reached a record high, with individual investors contributing significantly to the market rally, particularly in memory chip stocks, which saw total flows exceeding $117.2 million for the year [3] - Micron and SanDisk were among the five most actively traded stocks on Interactive Brokers' platform recently, indicating strong retail interest [5]