FSS Short Interest
Federal Signal Corporation (FSS) operates in the Industrials sector, specifically the Industrial - Pollution & Treatment Controls industry, with a market capitalization near $6.97B, listed on NYSE, employing roughly 4,700 people, carrying a beta of 1.32 to the broader market. Federal Signal Corporation, together with its subsidiaries, designs, manufactures, and supplies a suite of products and integrated solutions for municipal, governmental, industrial, and commercial customers in the United States, Canada, Europe, and internationally. Led by Jennifer L. Sherman, public since 1980-03-17.
Short interest is the total number of shares currently sold short and not yet covered, reported bi-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
- 2026-04-30
- Short Interest
- 3.5M
- Previous Short Interest
- 3.3M
- Change
- 6.48%
- Days to Cover
- 6.68
- Avg Daily Volume
- 523.5K
- Avg Days to Cover (24 reports)
- 7.99
Showing 24 bi-monthly FINRA short interest reports for Federal Signal Corporation.
Learn how short interest is reported and how to read the data →
Frequently asked FSS short interest questions
- What is the current FSS short interest?
- As of the Apr 30, 2026 settlement, Federal Signal Corporation (FSS) short interest is 3.5M shares, a +6.48% 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 FSS days-to-cover ratio?
- Days-to-cover is 6.68, 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 FSS 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.