Two days. That's all it took for hedge funds to flip the dollar trade.
New Fed Chair Kevin Warsh gave his first hawkish signal this week, and the big money didn't wait around to bet on it.
Hawkish - Fed-speak for leaning toward higher interest rates, which tends to strengthen the dollar.
Leveraged funds started buying dollar call options on Wednesday - bets that pay off when the greenback rises. By Thursday, the demand had piled up across major currency pairs.
Call option - a contract that gains in value if a currency or stock goes up. The opposite is a put, which pays off when it falls.
Against the British pound, dollar call volume hit more than 5x the volume of puts on Thursday, according to CME data. The same trade extended to the euro, where the largest call contracts ran nearly double the volume of similar-sized puts.
Why? When the Fed signals higher rates, assets priced in dollars like Treasuries pay more, drawing global money into the U.S. and pushing the dollar up. That's the trade hedge funds are now stacking chips on.
"We've seen large dollar call buying interests," Bank of America's Tobias Jungmann told Bloomberg. He said going long the dollar through options looks compelling right now because the cost of those options is unusually low.
Cheap options mean traders can place big directional bets without putting much money on the line, a setup that tends to draw in even more money chasing the trade.
The Bloomberg Dollar Spot Index - a basket that measures the dollar against major currencies - gained 1% combined over Wednesday and Thursday. The Treasury market followed, with a record surge in futures trading as traders fully priced in a quarter-point Fed rate hike by October.
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One currency pair didn't follow the script: dollar-yen.
Positioning there has been split, with some traders betting the dollar keeps climbing against the yen while others bet the opposite - that Japan's Ministry of Finance steps in to defend its currency.
The yen just hit its weakest level against the dollar since July 2024, prompting Japan's Finance Minister Satsuki Katayama to say Friday the government can take bold action against speculative moves.
Japan has a long history of stepping into currency markets when the yen slides too fast. Past interventions have sent the yen sharply higher in a matter of hours, burning anyone caught on the wrong side of the trade.
Translation: intervention is on the table. That's the kind of warning that makes traders hedge both directions.
The dollar trade now hangs on two things: whether Warsh delivers the rate hike the market is pricing in, and whether Japan steps in to slow the yen's fall.
Both could move fast, and the options market is already positioned for it.
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