We develop a model of investment, payout, and nancing policies in which rms face uncertainty regarding their ability to raise funds and have to search for investors when in need of capital. We show that capital supply uncertainty leads rms to value nancial slack and to adjust their policies to the level of their cash reserves, notably when choosing between retention and payout, between internal or external nancing of investment, and between speculation and hedging. In the model, investment and payout do not always increase with slack for constrained rms and the choice between internal and external funds does not follow a strict pecking order. In addition, the use of inside and outside cash are related to a number of rm characteristics, such as asset tangibility, cash ow volatility, access to capital markets, or agency costs.