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	{{def!Beta\|/ˈbiːtə/\|n\|}}So-so. Ordinary. Unspectacular. Safe. Dull. Meets expectations. Won’t try to rip you off.		{{def\|Beta\|/ˈbiːtə/\|n\|}}So-so. Ordinary. Unspectacular. Safe. Dull. Meets expectations. Won’t try to rip you off.

	Defined in a famous paper by William Sharpe in 1964 — he of the [[Sharpe ratio]] — [[beta]] is defined as: ''“a portfolio risk that cannot be diversified away by adding more securities to it.”''		Defined in a famous paper by William Sharpe in 1964 — he of the [[Sharpe ratio]] — [[beta]] is defined as: ''“a portfolio risk that cannot be diversified away by adding more securities to it.”''