Short Interest Tracker

Short Interest Tracker delivers short float percentage, days-to-cover, and month-over-month short interest changes for US-listed stocks — sourced from Finviz. Screen for the most heavily shorted stocks in the market, or look up specific tickers to assess their squeeze potential and directional risk. No Bloomberg subscription needed.

Short interest is one of the most actionable market structure signals: high short float + rising price = potential squeeze; rising short interest on a falling stock = momentum confirmation.

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Why use Short Interest Tracker?

1. Short squeeze candidate screening — Find stocks with short float >30% AND high days-to-cover (>5) where a price spike would force painful covering. Classic squeeze setup.
2. Squeeze risk monitoring — If you're short a stock, track whether short interest is rising (crowded) or falling (shorts covering). A rapid short interest decline signals squeeze risk.
3. Momentum confirmation — Stocks breaking out of consolidation with high short interest tend to run further as shorts cover. Screen for breakouts + high short float simultaneously.
4. Risk management — Before shorting a stock, check the short interest. High existing short float means crowded trade + higher squeeze risk for your position.
5. Sector short interest trends — Aggregate short interest across a sector to gauge overall bearish sentiment and potential rotation setups.

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How to use

1. Open the actor on Apify Store and click Try for free.
2. Choose mode: screener (find most-shorted stocks) or tickers (look up specific tickers).
3. In screener mode, set minShortFloat to filter by minimum short float percentage.
4. Click Start. Results are structured short interest records with all key metrics.

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Input

Field	Type	Default	Description
mode	string	"screener"	screener (find stocks by threshold) or tickers (look up specific stocks)
tickers	string	""	Comma-separated tickers for tickers mode (e.g. "GME,AMC,BBBY")
minShortFloat	number	20	Minimum short float % for screener mode
maxResults	number	25	Maximum records to return
sortBy	string	"short_float_pct"	Sort field: short_float_pct, days_to_cover, short_interest_change_pct

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Output

{
  "ticker": "GME",
  "company_name": "GameStop Corp.",
  "short_float_pct": 23.8,
  "days_to_cover": 4.2,
  "shares_short": 62000000,
  "shares_short_prior": 58000000,
  "short_interest_change_pct": 6.9,
  "float_shares": 260000000,
  "market_cap": 5200000000,
  "price": 20.0,
  "price_change_pct": 3.5,
  "volume": 4500000,
  "avg_volume": 3800000,
  "sector": "Consumer Cyclical"
}

Output fields

Field	Type	Description
ticker	string	Stock ticker symbol
company_name	string	Company name
short_float_pct	float	Short interest as % of float (key metric)
days_to_cover	float	Shares short ÷ avg daily volume (how many days to cover)
shares_short	integer	Total shares currently sold short
shares_short_prior	integer	Shares short in the prior FINRA reporting period
short_interest_change_pct	float	Month-over-month change in shares short
float_shares	integer	Total tradeable float shares
market_cap	float	Market capitalization in USD
price	float	Current stock price
price_change_pct	float	Today's price change %
volume	integer	Today's trading volume
avg_volume	integer	3-month average daily volume
sector	string	GICS sector classification

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Short interest interpretation guide

Short Float %	Days-to-Cover	Setup
> 30%	> 5 days	High squeeze potential — watch for catalyst
20–30%	3–5 days	Elevated — momentum can accelerate
10–20%	1–3 days	Normal elevated — sector-specific
< 10%	< 1 day	Low — stock well-understood by market

Squeeze signal: Short float > 25% + Days-to-cover > 4 + Rising volume + Positive catalyst

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Data freshness

FINRA requires broker-dealers to report short interest twice monthly (settlement dates around the 15th and end of month). Finviz updates its data within 1-2 days of each FINRA report. Expect ~2 week lag between actual short positions and displayed data.

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Cost estimation

Pay-Per-Event: $0.005 per actor start + $0.02 per stock record returned.

Use case	Records	Estimated cost
Top 25 most shorted	25	~$0.50/run
Top 100 stocks	100	~$2.00/run
Specific 10 tickers	10	~$0.20/run
Bi-monthly update	25 × 2	~$1.00/month

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FAQ

How current is the data? FINRA reports short interest bi-monthly. The displayed data is always ~2 weeks behind actual short positions due to this regulatory schedule.

Does it track naked short selling? No — only reported short interest (shares officially borrowed and sold short). Failure-to-deliver (FTD) data from SEC is a different source.

What's the most reliable squeeze indicator? Days-to-cover is often more actionable than short float % alone — a 40% short float with 1M float shares is very different from a 40% short float with 100M shares. Days-to-cover normalizes for liquidity.

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Related actors

• Options Unusual Activity — Unusual call buying on high-short-interest stocks = squeeze setup
• Analyst Price Target Tracker — Analyst upgrades on high-SI stocks trigger violent covering
• Dark Pool Tracker — Dark pool volume can signal institutional covering ahead of squeeze

Feedback

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