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Short excerpts of these working papers may be quoted without explicit permission provided that full credit is given to the source.

a b s t r a c tIn a seminal contribution, Ross (1976) showed that a static finite state-space market can be completed by supplementing the primitive securities with ordinary call and put options. Galvani (2009) extends this result to norm separable L p -spaces, with 1 ≤ p < ∞. This study concludes that options maintain the same spanning power in the space of bounded payoffs topologized by the duality with the space of the state price densities. In particular, under mild assumptions on the probability space, options written on a claim that is a.s. equal to an injective function complete the market.