Keynes the investor has recently attracted the attention of several scholars and quite a few articles have come out in the last five years. A description of Keynes’s dealings has emerged, assessing his performance as an investor as superior but not as stellar as had previously been believed. However, overall evaluation of Keynes’s performance is still lacking. This paper contributes to this growing literature by filling some of the gaps, especially in relation to Keynes’s investment philosophy and economic theory, and by undertaking a more comprehensive review of the available evidence, drawing on some unpublished sources which have not as yet been fully exploited.