DEFINITION of 'Rational Pricing'
A financial theory that contends that the market prices of assets will represent the arbitragefree pricing level for those assets. This is based on the assumption that any deviation from arbitragefree price levels for an asset will result in arbitrageurs immediately trading away the profit opportunity on the asset until it trades at an arbitragefree price.
INVESTOPEDIA EXPLAINS 'Rational Pricing'
A typical example of where the theory of rational pricing would be expected to come into play would be two identical assets trading in different markets. If the asset traded at a lower price in one market, an arbitrage trader would attempt to make a riskfree profit by purchasing the asset in the cheaper market by short selling the asset in the more expensive market. With enough volume, this arbitrage trading would cause the prices in both markets to converge to an equal value, removing the arbitrage opportunity.

Geographical Pricing
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Arbitrage Pricing Theory  APT
An asset pricing model based on the idea that an asset's returns ... 
FixedIncome Arbitrage
An investment strategy that attempts to profit from arbitrage ...

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