This paper studies how monetary policy should respond to news about an oil discovery, using a workhorse New Keynesian model. Good news about future production can create a recession today under exchange rate pegs and a simple Taylor rule, as seen in practice. This is explained by forward-looking inflation. Recession is avoided by a Taylor rule that accommodates changes in the natural level of output, which closely approximates optimal policy. Central banks have an incentive to exploit oil revenues by appreciating the terms of trade, creating “Dutch disease” and a deflationary bias which is overcome by committing to future policy.