Most modern major stock exchanges are electronic, but the New York Stock Exchange remains a live marketplace where traders match buyers and sellers.
The trader matches that order with someone selling the same type of derivative.
Analysis of thousands of shops and stores hints at a dramatic change in the character of Britain's commercial centres, with female traders now matching their male counterparts.
A standard double auction market collects bids from traders and matches the higher bids of buyers and lower bids of sellers to find the most efficient allocation, assuming that the value of unsold items remains unchanged.
In the nonstop auctions at those exchanges, specialists are responsible for maintaining orderly markets by matching up traders who want to buy certain securities with those who want to sell them.
A day trader nails the order, matching the investor's ill-considered price.
These computers, all competing with each other, are a lot cheaper and more efficient than human traders trying to match bids to buy and offers to sell.
China has already overtaken America as the biggest single trader and will match the EU by 2020.
We use spatial econometric models and matching methods to show how traders in northern India exploit gaps in regulatory policy, with potential for illegal and pre-mature harvesting of trees.
Insurer Travelers Companies was up 0.4% after topping expectations, while AT&T lost 1.1% despite matching the consensus estimate as trader showed concern over iPhone profitability.
Zvi Goffer, a former trader at Galleon, received a 10-year prison term, matching the longest previous sentence for insider trading.
