Investors typically watch the performance of the US dollar and asset markets closely. According to a warning from Bank of America's Hartnett, the total US Treasury debt has exceeded $40 trillion. Hartnett cautioned that if the 30-year Treasury yield fails to drop below 5%, it could lead to a sell-off of the dollar and risk assets, as the bank's long-term Treasury repo operations are seen as resembling "quasi-QE.