We study decisions to sell nonexcludable private information in the presence of a trading opportunity. Sell-side agents heighten competition among agents who buy their signals to combine with their own for proprietary trading purposes and thereby promote financial market efficiency. This result...

Financial markets are markets for information. As such, they are directly influenced by advances in information dissemination, storage, and processing associated with the commercial development of the Internet. On the other hand, given the long-standing centrality of information in financial...