With the finite signed Borel measures on the non-negative real time axis representing deterministic cash flows , it is shown that the only arbitrage-free price functional on these cash flows that fulfills some additional mild , economically motivated, requirements is the integral of the unit zero-coupon bond prices with respect to the measures that represent the cash flows . For probability measures, this is a Choquet representation, where the Dirac measures, as unit zero-coupon bonds, are the extreme points. Dropping one of the requirements, the Lebesgue decomposition is used to construct counterexamples, where the Choquet price formula does not hold despite of an arbitrage-free market model. The concept is then extended to deterministic streams of assets and currencies in general, yielding a valuation principle for forward markets. Under mild assumptions, it is shown that a foreign cash flow's worth in local currency is identical to the value of the cash flow in local currency for which the Radon-Nikodym derivative with respect to the foreign cash flow is the forward FX rate . While the derived valuation principles are ubiquitously used in theory and practice, they are usually neither stated in this general way, nor do derivations of them exhibit the here presented mathematical rigor, which is based on the definition of a market as an equivalence relation of exchangeability .
In a market of deterministic cash flows, given as an additive, symmetric relation of exchangeability on the finite signed Borel measures on the non-negative real time axis , it is shown that the only arbitrage-free price functional that fulfills some additional mild requirements is the integral of the unit zero-coupon bond prices with respect to the payment measures . For probability measures, this is a Choquet representation, where the Dirac measures, as unit zero-coupon bonds, are the extreme points. Dropping one of the requirements, the Lebesgue decomposition is used to construct counterexamples, where the Choquet price formula does not hold despite of an arbitrage-free market model. The concept is then extended to deterministic streams of assets and currencies in general, yielding a valuation principle for forward markets. Under mild assumptions, it is shown that a foreign cash flow's worth in local currency is identical to the value of the cash flow in local currency for which the Radon-Nikodym derivative with respect to the foreign cash flow is the forward FX rate .
R
With
In a market of deterministic cash flows, given as an additive, symmetric relation of exchangeability on
D
representing deterministic cash flows
D
on these cash flows
D
, economically motivated,
R
measures that represent the cash flows
payment measures
D
. While the derived valuation principles are ubiquitously used in theory and practice, they are usually neither stated in this general way, nor do derivations of them exhibit the here presented mathematical rigor, which is based on the definition of a market as an equivalence relation of exchangeability