In One Chart: Another Treasury bond auction could rattle stocks on Monday. Here’s what investors need to know.

An auction of 20-year Treasury bonds on Monday could rattle markets during an otherwise quiet holiday-shortened week, strategists said.

Investors are on edge after an auction of $24 billion in 30-year Treasury bonds BX:TMUBMUSD30Y sent markets reeling on Nov. 9, as Treasury yields spiked and U.S. stocks tumbled.

Once an afterthought for markets,…