The fund combines treasury-backed collateral with a rolling structure as the firm expands its structured exchange-traded fund (ETF) lineup.

Calamos Investments (Calamos) is set to list the Calamos Tax-Aware Collateral ETF (CBOX) on Cboe BZX Exchange today, introducing an options-based income strategy built around box-spread transactions. Calamos will maintain a laddered series of box spreads across different maturities  The actively managed fund is designed to generate tax-efficient returns by combining treasury collateral with options-market pricing, according to the fund’s registration statement filed with the US Se