ADJUSTABLE RATE MORTGAGE (ARM) is A mortgage that features predetermined adjustments of the interest rate at regular intervals. An ARM's interest rate is tied to an index outside the control of the lender.
BETA, generally, is a measure of systematic risk of a security; the tendency of a security's returns to correlate with swings in the broad market. More specifically, the beta is an indicator or statistical measure of the relative volatility of a stock, fund, or other security in comparison with the market as a whole. The beta for the market is 1.00. Stocks with betas above 1.0 are more responsive to the market, but are also more risky investments. Stocks with a beta below 1.0 tend to move in the opposite direction of the market. For example, if the market moves 10%, a stock with a beta of 3.00 will move 30%; a stock with a beta of .5 will move 5%.
AUCTION MARKET is a trading system in which buyers enter competitive bids and sellers enter competitive offers simultaneously. This, as opposed to the over-the-counter market, where trades are negotiated. Examples: the NYSE and the AMEX. It is sometimes called double auction market.
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