SHORT SALE is the selling of a security that the seller does not own, or any sale that is completed by the delivery of a security borrowed by the seller. Such sales are made in anticipation of a decline in the price of the security to enable the seller to cover the sale with a purchase at a later date, at a lower price, and thus at a profit. Short sellers assume the risk that they will be able to buy the stock at a more favorable price than the price at which they sold short.
COMPENSATING ERROR is the name given to the situation where one mistake cancels out the effect of a second mistake.
IMMUNIZED PORTFOLIO is a portfolio structured such that the duration equals the duration of the investor's liabilities. The assets in the portfolio are structured to match the volatility of the investor's liabilities, thereby significantly reducing exposure to interest rate risk.
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