The U.S. Treasury raised the maximum size of its next buyback of securities maturing in 10 to 20 years to $6 billion, triple the previous $2 billion cap and above the $4 billion minimum Treasury Secretary Scott Bessent outlined last month. The move failed to reverse a selloff in longer-dated government debt, with the benchmark 10-year yield reaching its highest level since November 2023 and the 20-year and 30-year yields rising to three-week peaks. Investors had hoped for a larger operation, with some anticipating as much as $10 billion, and questioned whether relatively small buybacks can offset the effects of widening federal deficits, persistent inflation and heavy global bond issuance. The Treasury market is roughly $32 trillion, while total U.S. debt recently exceeded $40 trillion. Archer Aviation shares had fallen 5.66% to $5.50 amid the earlier risk-off market backdrop, while ARK Invest bought 575,700 shares on September 8.