Famed investor Michael Burry on Monday revealed in a regulatory filing a short position against Tesla worth more than half a billion, CNBC reports.

Burry, one of the first investors to call and profit from the subprime mortgage crisis, is long puts against 800,100 shares of Tesla or US$534 million by the end of the first quarter, according to the filing with the U.S. Securities and Exchange Commission.

Investors profit from puts when the underlying securities fall in prices. As of March 31, Burry owned 8,001 put contracts, with unknown value, strike price, or expiry, according to the filing.

Shares of Tesla fell by more than 4 percent on Monday, bringing its month-to-date losses to nearly 20 percent.

Burry, whose firm is Scion Asset Management, shot to fame by betting against mortgage securities before the 2008 crisis. Burry was depicted in Michael Lewis’ book “The Big Short” and the subsequent Oscar-winning movie of the same name.

Tesla has had a turbulent 2021 amid slumping sales in China in April, and parts shortages that have impeded production both in the U.S. and China.

Burry previously mentioned in a tweet, which he later deleted, that Tesla’s reliance on regulatory credits to generate profits is a red flag.

As more automakers produce battery-electric vehicles of their own, ostensibly fewer will need to purchase environmental regulatory credits from Tesla, which they have done in order to become compliant with environmental regulations.

Besides his “Big Short,” Burry made a killing from a long GameStop position recently as the Reddit favorite made Wall Street history with its massive short squeeze.

In the first quarter of 2021, Tesla reported US$518 million in sales of regulatory credits, which Elon Musk’s company generally receives from government programs to support renewable energy. It has sold these to other automakers, notably FCA (now Stellantis) when they needed credits to offset their own carbon footprint.

In the fourth quarter of 2020, Tesla’s US$270 million in net income was enabled by its sale of US$401 million in regulatory credits to other automakers.

Tesla historically racked up around US$1.6 billion in regulatory energy credits, primarily zero emission vehicle credits, which helped Tesla report more than four consecutive quarters of profitability, qualifying Elon Musk’s automaker for addition to the S&P 500 index.

Michael Burry, one of the first investors to call and profit from the subprime mortgage crisis, is long puts against 800,100 shares of Tesla or US$534 million by the end of the first quarter, according to the filing with the U.S. Securities and Exchange Commission.

Investor Michael Burry has US$534m bet against Tesla