Kevin McCarthy
Speaker of the House Kevin McCarthy.
  • Three-month Treasury bills saw their highest yield since 2001, as debt ceiling concerns grow.
  • The Treasurys would mature around when the US government would run out of money.
  • The warning came as House Speaker Kevin McCarthy asked Wall Street to "don't sit back — join us."

The bond market sounded the alarm on US default risks as the deadline for reaching a deal on lifting the debt ceiling may come sooner than expected.

On Monday, the US sold $57 billion in three-month Treasury bills — which would mature around when the government could run out of money — at a yield of 5.1%, the highest since January 2001. 

That comes a week after a similar auction of three-month bills also saw lackluster demand.