Market capitalisation
A measure of a company's size, calculated by multiplying the total number of shares in issue by the current share price. Companies are commonly grouped according to size as small cap, mid cap or large cap. There is no consensus on the monetary boundaries of these ranges but as a rough guide in the US market: large cap is over $10 billion, mid cap is $2 billion–$10 billion and small cap is $250 million–$2 billion.