Key TakeawaysMichael Burry disclosed a short position in Micron (MU) at $1,051.87 per share, describing the stock’s ascent as fueled by “fear of missing out” and speculative excess.The renowned investor contends MU has entered bubble levels, citing poor capital efficiency and its extreme cyclicality as a concentrated DRAM manufacturer.Since early 2026, MU shares have skyrocketed more than 240%, though they’ve retreated approximately 10% over the last 30 days.This Micron bet forms part of Burry’s comprehensive AI sector short portfolio, which encompasses Nvidia, Tesla, Applied Materials, Caterpillar, and the SOXX semiconductor ETF.Simultaneously, Burry expanded long holdings in PayPal, Sprouts Farmers Market, Zoetis, Fannie Mae, and Freddie Mac according to his disclosure.Michael Burry, the hedge fund manager who gained worldwide recognition through “The Big Short,” has established a direct short stake in Micron Technology (MU), revealing the transaction through his Substack publication.Micron Technology, Inc., MUBurry initiated his short position in MU at a price of $1,051.87 per share. He noted that he bypassed options strategies because put contracts carried prohibitive premiums at entry, though he indicated plans to incorporate puts should implied volatility decline.Micron shares have soared more than 240% from the beginning of 2026. Despite this remarkable run, the stock has declined about 10% during the most recent month.Burry characterized the rally as propelled by “fear of missing out, greater fool theory, and public commitment bias.” He noted that MU currently trades further above its 200-day moving average than at any moment since 1984 — surpassing even the dot-com bubble heights.He labeled Micron as “cyclical like no other,” highlighting 34 separate drawdowns exceeding 30% across the previous 42 years. Such volatility typically gets overlooked when market euphoria dominates.Burry’s Bubble Thesis ExplainedBurry’s fundamental argument revolves around capital efficiency metrics. He characterized Micron’s return on invested capital and return on equity as “terrible,” asserting the company actually destroys shareholder value in approximately one of every three quarters.He also identified enormous global semiconductor investment as a warning sign rather than a positive catalyst. South Korea has independently unveiled a chip manufacturing initiative exceeding $500 billion. Burry’s perspective: when capital floods an industry at this magnitude, achieving genuine returns becomes increasingly difficult, not simpler.He drew parallels between today’s AI chipmania and the dot-com bubble, arguing that excessive capital is pursuing insufficient validated profitability.Component of Broader AI Short PortfolioThe Micron stake doesn’t represent an isolated wager. Burry has been constructing what he designates as an AI short basket.Earlier in the week, he revealed short positions in Nvidia (NVDA), Applied Materials (AMAT), Caterpillar (CAT), Tesla (TSLA), and the iShares Semiconductor ETF (SOXX).On the opposite side of his portfolio, Burry increased positions in PayPal (PYPL) at $45.31, Sprouts Farmers Market (SFM) at $89.33, Zoetis (ZTS) at $74.80, Fannie Mae (FNMA) at $6.15, and Freddie Mac (FMCC) at $5.69.Micron’s share price declined approximately 5.5% on the day his disclosure became public.The post ‘Big Short’ Investor Michael Burry Bets Against Micron (MU) Stock — Here’s His Reasoning appeared first on Blockonomi.