CBOX Short Interest
Calamos ETF Trust - Calamos Tax-Aware Collateral ETF (CBOX) operates in the Financial Services sector, specifically the Asset Management industry, with a market capitalization near $1.52B, listed on CBOE, carrying a beta of -0.00 to the broader market. 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"). public since 2026-04-17.
Short interest is the total number of shares currently sold short and not yet covered, reported twice monthly by FINRA. Days to cover (short interest divided by average daily volume) indicates how long it would take short sellers to close positions, with higher values signaling greater squeeze potential.
- Settlement Date
- 2026-09-30
- Short Interest
- 14.0K
- Previous Short Interest
- 9.8K
- Change
- 42.93%
- Days to Cover
- 1.00
- Avg Daily Volume
- 76.7K
- Avg Days to Cover (11 reports)
- 1.00
Showing 11 twice-monthly FINRA short interest reports for Calamos ETF Trust - Calamos Tax-Aware Collateral ETF.
Learn how short interest is reported and how to read the data →
Frequently asked CBOX short interest questions
- What is the current CBOX short interest?
- As of the Sep 30, 2026 settlement, Calamos ETF Trust - Calamos Tax-Aware Collateral ETF (CBOX) short interest is 14.0K shares, a +42.93% change from the prior period. FINRA publishes short interest twice monthly on the 15th and last business day of each month under Rule 4560.
- What is the CBOX days-to-cover ratio?
- Days-to-cover is 1.00, calculated as short interest divided by average daily volume. It estimates how many trading days closing all short positions would consume given typical liquidity. Values above 5 days are commonly cited as elevated; values above 10 days are squeeze-relevant.
- How does CBOX short interest affect options pricing?
- High short interest changes options pricing through three mechanics: borrow-rebate effects (synthetic long stock trades below frictionless put-call parity by approximately the borrow rebate when shares are hard-to-borrow), gamma-squeeze setup risk (if dealers are short gamma against retail call buying, dealer hedge flow can amplify upward moves), and elevated event-vol pricing on names with squeeze potential. See the canonical short-interest documentation for the full mechanism.