Days To Cover
// short interest divided by 30-day average daily volume
Days to cover (DTC) is the ratio of total short interest to the 30-day average daily trading volume. It estimates how many trading days the short side would need to fully unwind its position at current liquidity.
- Higher DTC means a slower unwind. Above 5 days is a meaningful liquidity constraint on short covering; above 10 is severe.
- Pairs with squeeze-score and utilization. High DTC plus high SI plus high borrow fee identifies names where a forced-cover event would move price violently.
- DTC is a liquidity ratio, not a timing signal.
How it is calculated
The numerator is the same FINRA bi-monthly count that drives SI %-of-float. The denominator is a 30-session average of the consolidated-tape volume. DTC inherits the lag from FINRA SI reporting; a sudden volume spike updates the denominator daily but the numerator only refreshes on the next FINRA settle.
What traders use it for
- Assessing the liquidity constraint on a short squeeze. A name with SI 25% and DTC 12 takes weeks of full-volume-day cover to unwind; the constraint is what makes the squeeze potential real.
- Cross-checking momentum trades. A name with rising RVOL and falling DTC is having its short side rapidly unwound; a name with rising RVOL and stable DTC is seeing new long buying.
- Building short-side risk dashboards. DTC is a single number that summarizes "how fast can this short unwind."
Worked example
Suppose GME short interest of 60.0M shares from the FINRA report dated 2026-04-15. The 30-day average daily volume on GME is 12.4M shares. Days to cover = 60.0 / 12.4 = 4.84. As of report date 2026-04-15. A DTC near 5 means a full short unwind would take a full trading week of typical volume; that is a meaningful liquidity constraint on short covering.
Live data: /stocks/GME.
Common pitfalls
- Inherits the FINRA SI lag. DTC is computed from a 10-business-day-stale numerator; cross-check with the live borrow-fee and utilization feeds.
- Volume spikes inflate the denominator and depress DTC. A name that traded 5x typical volume yesterday will print a lower DTC today even though the short interest has not changed.
- DTC says nothing about the catalyst. A high DTC is dry powder; what lights it is the news flow, not the metric.
- Average-daily-volume choice matters. A 30-session window is the FINRA convention; some platforms use 10 sessions, which makes DTC more responsive but noisier.
Where this metric appears on Tapeboard
DTC renders on every `/stocks/{T}` page, on the /short-squeeze-stocks landing, and feeds the Tapeboard squeeze score with a 15% weighting.
Related terms
- Short Interest: FINRA short-interest reports settle bi-monthly with a publication lag of about 10 business days from the report date.
- Utilization (Lending): Daily-published, sourced from broker-dealer stock-loan books (Tapeboard uses IBKR).
- Squeeze Score: Five-input composite: SI %-of-float (35%), borrow fee (25%), float utilization (20%), days to cover (15%), 5-day momentum (5%). Weights last calibrated 2024-11-15.
Primary sources cited
- FINRA Days to Cover methodology note: Days to cover is a derived metric from FINRA short-interest data divided by average daily trading volume. https://www.finra.org/finra-data/short-interest, retrieved 2026-05-04.
- FINRA Short Interest Reporting: Short-interest input to days-to-cover comes from the FINRA bi-monthly report. https://www.finra.org/finra-data/short-interest, retrieved 2026-05-04.
Methodology last reviewed 2026-05-04 by Marcus Reilly, Editor at Tapeboard. Every claim on this page has a row in the citation registry. Glossary terms reverify on the Jan 15 / Apr 15 / Jul 15 / Oct 15 cron and any time the underlying primary-source publishes a methodology change. See methodology for the full fact-check process and corrections for the public correction log.
Disclaimer. This page is for educational and informational purposes only. Nothing on Tapeboard is investment advice. See the full risk disclaimer.