A surge in bets on U.S. Treasury securities has been observed ahead of the Federal Reserve's decision on interest rates. A bond trader reportedly made a substantial profit from a one-day options bet anticipating that Treasury yields would rise following the Fed's announcement. The trader had placed a $2,500 wager on Polymarket, predicting an increase in interest rates, which could yield a payout of $1.66 million if successful. Additionally, another user placed a $1.86 million bet that there would be no rate changes, potentially earning $35,000 if the Fed maintains its current rates. As of the Fed's latest decision, interest rates remain unchanged at 4.25% to 4.50%.