Charles Schwab announced on Thursday three new, low-cost bond exchange-traded funds with no online trading commissions for Schwab clients.

This is in addition to the eight equity ETFs that Schwab already offers.

The Schwab Bond ETFs provide exposure to three types of U.S. Treasuries – short-term, intermediate-term and inflation-protected securities.

“There is growing demand from investors, traders and advisors for ETFs at a low cost,” said Peter Crawford, senior vice president at Schwab, in a press release. “Fixed Income ETFs are the fastest growing segment of the ETF market. We see tremendous potential for their continued growth.”

The three new Schwab ETFs are the Schwab U.S. TIPS ETF (SCHP), Schwab Short-Term U.S. Treasury ETF (SCHO) and Schwab Intermediate-Term U.S. Treasury ETF (SCHR).

Schwab had nearly 25% of total U.S. retail ETF assets as of year-end 2009, according to FUSE Research Network and Schwab. Schwab’s eight equity ETFs have $1.4 billion in assets under management as of July 30, 2010 and all eleven of Schwab’s ETFs offer among some of the lowest expenses in the industry, the firm said.

Schwab Bond ETFs can be purchased in increments as small as one share per trade.

The Charles Schwab Corporation has more than 300 offices and 7.9 million client brokerage accounts, 1.5 million corporate retirement plan participants, 803,000 banking accounts, and $1.36 trillion in client assets.