Float (Stock Float)
Quick Definition
The number of shares available for public trading, excluding insider holdings, restricted shares, and closely held shares.
Key Takeaways
- Float is the number of shares available for public trading after excluding insider and restricted shares.
- Low-float stocks are more volatile because less supply means bigger price swings.
- Short squeezes are more likely in stocks with low float and high short interest.
What Is Float (Stock Float)?
A stock's float (or free float) is the number of shares that are actually available for public trading. It is calculated by subtracting restricted shares, insider holdings, employee stock ownership plan (ESOP) shares, and other closely held blocks from the total shares outstanding. Float is a critical factor in a stock's volatility and liquidity—low-float stocks (under 10-20 million shares) can experience extreme price swings because a relatively small amount of buying or selling pressure moves the price significantly. Short squeezes are more likely in low-float stocks because short sellers have fewer shares to borrow. The float percentage (float ÷ shares outstanding) indicates what portion of the company is freely tradable. A company with 100 million shares outstanding but only 20 million in the float has a 20% float ratio, meaning insiders and institutions hold 80% of the stock in non-trading positions.
Float (Stock Float) Example
- 1GameStop had a small float of ~70 million shares with over 100% short interest, creating conditions for the 2021 short squeeze.
- 2A biotech company with only 5 million shares in the float surged 200% on FDA approval news as buyers overwhelmed the limited supply.
Related Terms
Market Capitalization
The total market value of a company's outstanding shares, calculated by multiplying share price by total shares outstanding.
Short Squeeze
A rapid price increase caused by short sellers being forced to buy shares to cover their positions, creating a self-reinforcing buying cascade.
Liquidity
The ease and speed with which an asset can be converted to cash without significantly affecting its market price.
Authorized Shares
The maximum number of shares a company is legally permitted to issue, as specified in its corporate charter or articles of incorporation.
Stock
A security representing ownership in a corporation, entitling the holder to a share of profits and voting rights.
Initial Public Offering (IPO)
The first sale of a company's stock to the public, transitioning it from private to publicly traded.
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