https://wallstreetonparade.com/2022/03/deutsche-bank-has-lost-38-percent-of-its-market-value-in-a-month-thats-a-big-problem-for-wall-street-and-the-fed/

Deutsche Bank (symbol DB on the above chart) closed at $16.50 on the New York Stock Exchange on February 10 of this year. It closed at $10.23 yesterday – a decline of 38 percent in a month’s time. That’s a big problem because Deutsche Bank is heavily interconnected to Wall Street banks via derivatives. According to Deutsche Bank’s most recent annual report, as of December 31, 2020, it held $35.4 trillion in notional derivatives. (Notional means face amount. See the table on page 147 of the 2020 Deutsche Bank Annual Report here.)