(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.
The Bid/Ask Spread. The bid/ask spread is the difference in price between the bid and ask. In active stocks the bid/ask spread is typically $0.01, for example the bid is $10.05 and the offer is $10.06. The attached chart example shows a Level 2 in the SPDR S&P 500 ETF.