[Investors' 2000 times leverage to copy the bottom Warren Buffett can't help but be trapped by Internet brokers.] Due to the technical failure of the New York Stock Exchange, Berkshire Hathaway's Class A shares fell 99.97% at one time, which not only became an "opportunity" for many investors to copy the bottom Warren Buffett, but also became a "big test" for the risk control ability of Internet brokers. On June 6th, an investor posted on social media stating that when the total amount of their account was only $1300, they successfully bought 4 Berkshire A shares at Huasheng Securities, with an average purchase price of $710830.55 and a total amount of $2846225.04. Around 19:00 on June 5th, 2023, Huasheng Securities finally decided and informed that they required the margin to be paid before 21:30 on that day, otherwise they would be forced to clear their positions during trading and clear all stocks in their account. On the evening of June 5th, we received a clearance SMS notification that all stocks were forced to close. After being forced to close its position, the investor owed Huasheng Securities $389300 and generated approximately $61.87 in interest per day. As of the evening of June 7th, the cumulative loss on the book was $390600.