Secondary bond market

The nature of municipal bonds is to help people, says Peter Hayes, "I really like that it's public purpose."

All eyes will be on Friday's report, though "it seems most leading indicators suggest job growth will remain healthy, which should keep the bond market selloff going strong," said OANDA's Edward Moya.

Municipal yields fell up to three basis points, depending on the scale, but underperform a better UST market.

UST rates are driving all things in the muni market, said Jon Mondillo, head of North American Fixed Income at abrdn.

There will be "choppiness in the municipal bond market through the end of the year," said Anders S. Persson, Nuveen's chief investment officer for Global Fixed Income, and Daniel J. Close, Nuveen's head of municipals.

The Bloomberg Municipal Index and High-Yield Index lost 3.3% and 3.9%, respectively, in September.

The last time muni mutual funds saw outflows top $1 billion was the week ending May 31 when they were $1.345 billion.

"The market has taken to heart the [Federal Open Market Committee] actions from last week," said Jeff Lipton, managing director of credit research at Oppenheimer Inc.

Yields have "risen substantially over the last week as the market seeks to find at least a minor level of balance or equilibrium," said Tom Kozlik, managing director and head of public policy and municipal strategy at HilltopSecurities.

"People are just kind of sitting on their hands and being careful because MMD is raising yields every day and people don't know which way this is heading," said John Farawell of Roosevelt & Cross.