(plural materializations) 1  The conversion of something into a physical form. ( 2 physics) The conversion of energy into mass.
Market Order-- to sell Hutchison: sell Hutchison now at whatever prevailing market price. Usually one will get the stock at the ask price of the moment when the order reaches the exchange. Sometimes, one gets a series of partial trades (partially filled orders) at different prices, the shares of which add up to 2000.
Both prices are quotes on a single share of stock. The bid price is what buyers are willing to pay for it. The ask price is what sellers are willing to take for it. If you are selling a stock, you are going to get the bid price, if you are buying a stock you are going to get the ask price. The difference (or spread) goes to the broker/specialist that handles the transaction.