An exchange, or bourse also known as a trading exchange or trading venue, is an organized market where tradable securities, commodities, foreign exchange, futures, and options contracts are sold and bought
A broker is an individual or firm that acts as an intermediary between an investor and a securities exchange
In finance, margin is collateral that the holder of a financial instrument has to deposit with a counterparty to cover some or all of the credit risk the holder poses for the counterparty.
A Bid is the price selected by a buyer to buy a stock, while the Offer is the price at which the seller is offering to sell the stock
Leverage is any technique involving using debt rather than fresh equity in the purchase of an asset, with the expectation that the after-tax profit to equity holders from the transaction