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Calamos Tax-Aware Collateral ETF

Cboe: CBOX

Listed April 17, 2026

Calamos Tax-Aware Collateral ETF Overview

Calamos Tax-Aware Collateral ETF seeks to deliver stable growth by investing in FLEX options box spreads, principally on the SPDR S&P 500 ETF (SPY) to achieve tax-efficient cash management.

Key Features

  1. Treasury Bill Alternative. Treasury bills are not the only option for short-term cash management.
  2. Tax-Efficient Structure. Potential tax-efficient alternative to ultra-short duration bond exposure.
  3. Outperformance Potential. Potential to generate returns above Treasury bills with limited incremental risk.
  4. Institutional Investor Tested. A long-standing tool used by institutional investors to borrow and lend synthetic cash.

Portfolio Fit

Cash Management Alternative & Treasury Overlay. Seeks yields above risk-free rates in a tax-efficient structure.

Collateral Optimization. High-quality collateral without tying up capital.

Duration-Neutral Return Sleeve. Return engine without rate or equity beta.

Fact Sheet Prospectus & Information

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About Calamos Advisors LLC

Our history traces back to the challenging markets of the 1970's, when John P. Calamos, Sr. began his investment career using convertible securities to help clients build wealth and manage risk. The hallmarks of those early days - innovation, risk management and client focus continue to define our organization today. Our investment solutions include alternative, equity, sustainable, multi-asset, fixed income and convertible strategies.

We view our success and longevity as a reflection of our ability to meet the demands of investors through long-term performance, organic growth and strategic acquisition. Through that lens, we are honored that our assets under management have nearly doubled under the leadership of our President and Chief Executive Officer John Koudounis. Under his leadership, we have also expanded our presence in New York and Chicago, grown our wealth management capabilities, and established ourselves as a leading liquid alternatives provider, the third largest in the United States.

Headquartered in Napervile, Illinois, Calamos Investments has offices in Chicago, New York, San Francisco, Milwaukee, Portland, and the Miami area.

https://www.calamos.com/