關於商業界財經英文的翻譯

請問以下英文內容意義為何
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the market in which previously issued financial securities are sold.

The over-the-counter market is composed of thousand of securities dealers located all over the country, the transactions in the stocks are executed over the telephone or via computer.

dealer specialize in various commodities, purchase assets for their own inventory, and sell goods for a profit from their inventory. Dealers, unlike brokers經紀商, trade assets for their own accounts. The dealer’s profit margin is the “bid-asked” spread.

Several important trends have changed the contemporary investment environment:

From the early 1970s until the late 1980s, regulatory changes were mostly in the direction of deregulation, which is the removing or phasing out of some existing regulations.

Many banks reduce their default risk exposure entirely by selling loans to another bank or to a firm specializing in securitization -- the pooling and repackaging of similar loans into marketable securities.