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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