Traders are securing last-minute bets on the Treasury rally

Bond investors are rushing into trades that would benefit from a rally in Treasury bonds, pricing in a scenario that is seen as more likely if the U.S. president wins Kamala Harris while betting is cut back, which is seen as an advantage for a win Donald Trump.

Since Monday, the U.S. options business has been dominated by short-term bullish bets, with traders bracing for a possible Harris victory after weekend polls showed the U.S. vice president gaining ground on former President Trump. The change has also taken place in futures.