Bid Size

Bid Size - The bid size is the number of shares, which are offered for purchase at a specific bid price. This bid price is often expressed by the hundreds of shares, although traders have been known to use the ask size and the bed size to attempt to calculate any impending short-term increases and decreases pressures being felt on the stock's price. Although this can work amazingly well, occasionally, on the NYSE and AMEX, it is far less of a useful tool on the Nasdaq, which generally has Market Makers waiting to buy and sell shares, rather than market specialists to balance their books with buy and sell orders.