New York's Jacob Javits Convention Center has been among the bond issuers impacted.
The securities have posted a loss of 0.37% since the start of August.
Sales of municipal bonds that won't be delivered to investors until months after they price have reached about $10.5 billion.
Connecticut will invest $600 million in its “baby bonds” program over 12 years. New York will set up $100 college savings accounts for kindergarteners.
The municipal junk-bond boom is roaring back.
At about $3.5 billion for the first third of 2021, the pace of muni green-bond sales exceeds last year's clip.
The nearly $200 billion being earmarked to state governments goes beyond a rescue.
Governors in more than six states are taking steps to help small businesses or residents thrown out of work.
Sellers have issued $92 billion in debt subject to federal income taxes so far this year.
Many global investors are finding the long-term stable outlook of colleges appealing as weaker borrowers stumble.