AAII Model Fund Classifications
We categorize mutual funds by the size of their stock holdings. Size is measured by the average market capitalization (share price times the number of shares outstanding) of the stocks held by the fund.
Here is how we break down these categories:
| Size Category | Market Cap |
| Giant-Cap | $15.5 billion and greater |
| Large-Cap | $3.5 billion to $15.5 billion |
| Mid-Cap | $1.6 billion to $3.5 billion |
| Small-Cap | $400 million to $1.6 billion |
| Micro-Cap | $200 million to $400 million |
| Nano-Cap | Below $200 million |
