Golden Finance reported that hedge funds suffered the largest margin call since 2020 after Trump's tariffs triggered a sharp decline in global financial markets. Wall Street banks have asked their hedge fund clients to put out more funds as loan guarantees as the value of their holdings shrank significantly, according to three people familiar with the matter. Several major banks issued the largest margin call notices to customers since early 2020, highlighting the drastic turmoil in global markets on Thursday and Friday. "The sharp drop in interest rates, stock markets and oil prices...it is the breadth of the overall volatility that has led to the scale of margin additions," said an executive of a bulk brokerage firm. He added that it reminds of the big market volatility in the first few months after the outbreak of the coronavirus. "We are actively engaging with our clients to give them a full understanding of the risks," said another major U.S. bank executive.