Charles Schwab (NYSE: SCHW) continues to roll out diversified exchange traded funds offering rock-bottom fees and free online ETF trades for its clients. Now the broker has introduced a U.S. total-market bond ETF with an expense ratio that undercuts the competition.

The ETF is designed as a core, diversified holding representing the U.S. fixed-income market. It holds Treasuries, government agencies, corporate and securitized bonds.

Schwab U.S. Aggregate Bond ETF (NYSEArca: SCHZ) has an expense ratio of 0.1%, the lowest in the category.

“We have seen tremendous demand for a single vehicle that provides a core, diversified, U.S. fixed income allocation, and the Schwab U.S. Aggregate Bond ETF seeks to do just that, at an exceptional value,” said John Sturiale, vice president of product management at Schwab.