4 GBM: Let Yt and Y t be two independent Brownian motions, and is a constant...

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4 GBM: Let Yt and Y t be two independent Brownian motions, and λ is a constant such that 1 <λ< 1. Then the process Xt ˆ λ Yt ‡ f p

…1  λ2†g Y t is continuous and has marginal distributions N(0, t).

Is the process Xt a GBM? Explain.

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