Michael Burry disclosed a new set of positions through his paid newsletter Cassandra Unchained on Thursday, July 30, saying he added to a short in Micron (MU) at $880, shorted the semiconductor ETF SOXX at $506, and continued to increase his short in Nvidia (NVDA). The update landed on the same day Micron jumped more than 16% in early trading and set a record high.
Third disclosed Micron short add in July
The source says Burry first disclosed a direct short in Micron on July 2 at $1,051.87. He added again on July 24 at $933.86, and on that same day also increased bearish positions in SOXX at $535.83 and Nvidia at $210.28. The $880 Micron trade disclosed for July 30 marked his third add within a month.
The sequence matters. Each disclosed Micron short add came at a lower price than the previous one. The report said Micron was back at $903 on July 31 and touched $927 intraday, putting the latest $880 short underwater less than a day after it was posted.
SOXX short overlaps with existing single-name bets
Burry also disclosed a short in SOXX at $506 while continuing to add to his Nvidia short. According to the source, SOXX had closed at $465 the previous day and finished July 30 at $502.22, up nearly 8% on the day. His entry price sat close to the intraday high of $509.98.
The article said the top three holdings in SOXX were AMD at 8.84%, Nvidia at 8.56%, and Micron at 8.29%. On that basis, shorting the ETF added exposure to two stocks he had already shorted directly.
“A sizable batch of trades, but only two kinds of charts”
The newsletter post carried the subtitle, “A sizable batch of trades, but only two kinds of charts.” Its opening line said there were “all buys and adds, no sells.” The source said Burry did not spell out what the two chart types were, but the list itself pointed in one direction: the shorts were names that had gone nearly vertical, while the longs were stocks that had spent the past year beaten down.
On the long side, the report listed DraftKings at $23.40, Lululemon at $118, and Zoetis at $76.
Micron rally followed Samsung earnings
The source said Micron’s sharp move on July 30 was triggered by Samsung Electronics, which reported record second-quarter operating profit and said capital spending would continue to chase AI server demand. That pushed Micron up more than 16% and into a fresh all-time high.
On the same day, SK Hynix rose 27%, South Korea’s stock market hit a circuit breaker, and memory names rallied broadly across global markets. Burry added to the Micron short into that move.
Source links the trade to AI “circular financing”
The article also focused on Micron’s ties to the AI supply chain. It said Micron signed a strategic partnership with Anthropic on June 22, becoming a key memory and storage supplier for the company’s next-generation models. The two sides were described as jointly designing a high-bandwidth memory, or HBM, architecture, while Claude was being rolled out across Micron internally. The same partnership also included Micron’s participation in Anthropic’s Series H financing round.
The source framed that structure as “circular financing”: a supplier invests in a customer, and the customer then uses capital that helps fund purchases from the supplier. It added that Burry’s July 23 newsletter headline explicitly referenced the Bank for International Settlements, or BIS, commenting on aggressive circular financing in AI. In the article’s telling, his Micron short was aimed at that funding loop rather than memory demand itself.
Anthropic Series H and other market references in the source
According to the source, Anthropic’s Series H was co-led in May by Sequoia Capital and Greenoaks at a $965 billion valuation. It also said another participant in the same round, Leopold Aschenbrenner, described there as an “AI stock god,” was forcibly liquidated this week, with a $24 billion fund wiped out. Before exiting, he had tried to sell private shares to Sequoia Capital and Greenoaks.
The article also drew a contrast with Apple CEO Tim Cook, who on the same day’s earnings call described shortages and pricing pressure in the memory market as a “once-in-a-century flood.”
No regulatory filing cited for position verification
On whether the disclosed numbers can be verified, the source said they do not carry regulatory backing. Scion Asset Management ended its SEC registration in November 2025 and no longer files 13F reports, leaving Burry’s paid newsletter as the only cited source for the positions and entry prices. The article said outside observers cannot cross-check them against official filings.