1.   Digital would still be free to sell computers based on the Alpha, he said.

2.   He sells stocks based on indicators like selling pressure, or changes in fundamentals, like deteriorating earnings.

3.   Investors can also sell based on an asset-allocation strategy.

4.   Like stocks, the Big Board sells seats based on bid and ask prices.

5.   On the Nasdaq, a small-order execution system lets many traders buy and sell shares based on published quotations.

6.   Still others, such as Kevin Cousins of BOE Asset Management, buy or sell based on the stock price relative to net asset value.

7.   That said, he and the other co-manager, Adele S. Weisman, left, do not buy and sell stocks based on short-term market moves.

8.   The SEC may let funds sell shares based on the profile prospectus, officials said.

9.   They buy and sell based on their analysis of supply and demand.

10.   While WebLawPartner hopes to sell forms based on its pedigree, other Web sites do offer legal information or forms free.