Calamos Tax-Aware Collateral ET (CBOX) is an exchange-traded fund in the Relative Value Arbitrage category. It has $1.66B in assets and an expense ratio of 0.14%. The fund is an actively managed exchange-traded fund ("ETF") that seeks to achieve its investment objective through multiple combinations of synthetic long and short exchange-listed options positions, collectively referred to herein as a Box Spread ("Box Spread"). It is non-diversified.