Muni Charges Eat Up Interest as Yields at 40-Year Low

Peter Kuhn, an investor from San Jose, California, who owns more than $1 million in municipal bonds, scours pricing websites and uses Zions Bancorporation’s online brokerage to avoid getting overcharged when he buys tax-exempt debt.

Consumers who aren’t as savvy may be paying more than they have to for state and local obligations in the $2.8 trillion U.S. municipal market, where individuals and mutual funds hold about two-thirds of outstanding securities. Firms selling to customers mark up the price an average $5 to $10 per $1,000 bond, or 0.50 percent to 1 percent, said Thomas Doe, chief executive officer of Municipal Market Advisors, a Concord, Massachusetts-based research firm.