The deal could be the biggest municipal-bond sale in Texas in at least two decades.
The state is among at least eight where GOP lawmakers want to punish Wall Street for what it sees as restrictive gun policies.
Municipal bonds have lost about 3.3% since the beginning of January.
The laws aim to punish Wall Street companies that are deemed to have restrictive gun policies.
Analysts agree that borrowing by state and local governments will continue.
The $4 trillion municipal bond market looks to be off to its worst start in more than two decades.
The bank is joining rivals Citigroup and JPMorgan in halting such business in Texas.
The amount of debt changing hands in the secondary market has picked up after a global fixed-income selloff.
The law blacklists banks that have cut off investments to the gun industry.
The push reflects the growing influence of the socially responsible investment business.