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In October, the Dow Jones Industrial Average peaked at 26,952, the highest point on record for the stock index.

The DJIA is a price-weighted average of . The index currently contains companies such as the world’s largest retailer Walmart, media juggernaut Disney, global financial institution J.P. Morgan, aerospace and defense giant Boeing, and as of 2015, tech behemoth Apple.

The companies comprising the Dow change over time to reflect . Since the creator of the index, Charles Dow, was also the founding editor of The Wall Street Journal, editors at the publication select the companies that comprise the index.

Record bull market:

Retirement planning:

Since its inception in 1896, when