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The Treasury is expected to announce Wednesday how large it will make its bond buyback operations, with analysts at Wrightson ICAP seeing $5 billion to $6 billion as a likely starting point

Treasury Secretary Scott Bessent (Buddhika Weerashinghe/Bloomberg via Getty Images).

Treasury Secretary Scott Bessent dared currency and bond market traders to challenge his interventions on Tuesday, hours before the Treasury Department was set to reveal how large it would make its bond buyback program.

"I am the house now," Bessent said at a Southern Methodist University event in Texas on Tuesday, referring to his department's moves to support the Japanese yen, according to Bloomberg. "And you can bet against me if you want."