This paper investigates how financial-sector leverage affects macroeconomic instability and welfare. In the model, banks borrow (use leverage) to allocate resources to productive projects and provide liquidity. When banks do not actively issue new equity, aggregate outcomes depend on the level...

When financial intermediaries’ key characteristic is provision of liquidity through their liabilities, with financial frictions the financial sector in the aggregate is likely to over-accumulate equity, thus decreasing liquidity provision and household welfare. Aggregate household welfare is...

In standard Walrasian macro-finance models, pecuniary externalities such as fire sales lead to overinvestment in illiquid assets or underprovision of liquidity. We investigate whether imperfect competition (Cournot) improves welfare through internalizing the externality and find that this is far...