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A standard against which a security's performance is compared. A benchmark is usually an index of securities of the same or similar class. Stocks are usually compared against stocks; bonds against bonds, etc. Another type of benchmark considers securities according to industry: a telecommunications stock may be compared to other telecommunications stocks. Likewise, mid-cap securities may be benchmarked against other mid-cap securities. Some indices, such as the Dow Jones Industrial Average and the S&P 500, are considered to be benchmarks for the wider economy.