This makes the job of creating an all-index fund portfolio easy.

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To compare alien planets, Dr. Mendez at the Planetary Habitability Laboratory and his colleagues are creating an Earth Similarity Index that ranks worlds by their resemblance to our own planet, on a scale from zero to one, based on their mass, radius, density and surface temperature.

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The talk includes long-term planning, creating an appropriate asset allocation, and the selection of low-cost index funds and ETFs.

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This means creating an appropriate investment policy, implementing that policy using low-cost index funds, and following the policy through during all market conditions.

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