Abits
ABTS
Bakkt Holdings
BKKT
Riot Platforms
RIOT
Canaan
CAN
CATHEDRA BITCOIN INC
CBTTF
Nuveen Select Tax Free Income Portfolio is a diversified closed-end investment company. It seeks to provide current income and stable dividends, exempt from regular federal and designated state income taxes, consistent with the preservation of capital by investing primarily in a portfolio of municipal obligations.