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Operational efficiency and informational efficiency

Distinguish between Operational efficiency and informational efficiency?

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Operational efficiency and informational efficiency:

A) Operational efficiency concentrates on bringing buyers and sellers altogether at the minimum possible cost.

B) Markets show informational efficiency when market prices reflect all related information regarding securities at a specific point in time.

C) In an informational efficient market, the market prices adjust rapidly to new information concerning a security as it becomes obtainable.

D) Competition between investors is a significant driver for informational efficiency.

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