We exploit the availability of active single-stock futures on India's National Stock Exchange (NSE) to provide estimates of overall informational efficiency, without conditioning on a public announcement. The key is the estimation of the primitive parameters of an asset pricing model with...

Using NYSE TAQ data, we compute MLEs of the primitive parameters of a Kyle-type model, including the variance of fundamentals given only public information, the variance of errors in private signals, and the variance of uninformed liquidity trading (noise). An out of sample test shows that the...