📊 FINRA Short Interest Tracker

📚 Welcome to the FINRA Short Interest Tracker

This dashboard visualizes bi-weekly short interest data reported to FINRA across 8,000+ US-listed securities from January 2020 to present. Short interest (SI) is the total number of shares that have been sold short and remain outstanding.

Key Concepts

• Short Interest (SI) — total shares sold short at a settlement date
• SI % of Float — short interest divided by float (freely tradable shares); higher % = more crowded short
• Z-Score — how many standard deviations current SI growth is from that ticker's historical norm. Z ≥ 2 is statistically unusual.
• Settlement Date — FINRA reports SI as of the 15th and end of each month (~bi-weekly)

📈 Trend Chart

Search and compare short interest trends for up to 8 tickers at once.

• Search bar — type a ticker symbol or company name. Click a result to add it as a chip.
• View toggle — switch between Shares Short (absolute), SI % of Float (relative), and Normalized Base=100 (compare momentum).
• Period buttons — filter the chart to a single year or view the full history.
• If a ticker lacks float data, the chart auto-switches to Shares Short and shows a note.
• Click any ticker chip's × to remove it from the chart.

🏷 Themes

Pre-built sector and thematic baskets showing aggregate short interest momentum.

• Cards — each card represents a theme (e.g., Critical Metals, Meme Stocks). Red border = rising SI, green = covering.
• Heat score — aggregate Z-score across all constituents. The colored bar shows where the theme sits.
• Click a card to expand the detail panel with a chart and constituent table.
• Y-Axis selector — switch between Indexed (normalized), SI % of Float, or Raw SI for the chart and table.
• Chart View — show the aggregate line, individual constituents, or both.
• Alerts at the top auto-surface themes with elevated or covering momentum.

📈 Rising Shorts

Finds tickers with statistically unusual short interest buildup or covering activity.

• Z-Score filter — raise the minimum to surface only the strongest anomalies (default ≥ 2.0).
• Min SI — filter out micro-cap noise by requiring a minimum short position size.
• Lookback — compare current SI against 2 weeks, 6 weeks, or 6 months ago.
• Direction — toggle between Building (shorts increasing) and Covering (shorts decreasing).
• Column sorting — click any column header to sort. Click again to reverse.
• Sparkline — shows the last 26 periods of SI history at a glance.
• Click any row to jump to the Trend Chart with that ticker selected.

📊 Sector Sentiment

Top-down view of short interest across market sectors.

• Sector cards — show the number of rising vs. covering stocks in each sector.
• Heatmap — color intensity indicates the concentration of short buildup.
• Click a sector to drill down into its constituents.

🔍 Screener

Filter the full universe by market cap, SI percentage, and change metrics.

• Market Cap filters — set min and max to focus on a specific size segment.
• Min SI % — find the most heavily shorted names.
• 6-month change — surface tickers where short interest has moved the most.
• Results are sortable by clicking column headers. Click a row to chart it.

ⓘ Data Sources & Notes

• Short Interest: FINRA bi-weekly settlement reports, 151 periods from Jan 2020 to Apr 2026.
• Float data: Capital IQ (IQ_FLOAT) quarterly snapshots, interpolated to settlement dates. ~9,150 of 13,819 tickers have float coverage.
• Refresh cadence: FINRA publishes new data ~10 business days after each settlement date.
• Tickers without float data will show "Shares Short" only and are excluded from SI% rankings.