The article explores how financial crises can be triggered by shocks within the financial sector itself, rather than from external factors. It uses a bank-run perspective to show how liquidity shocks can lead to asset price collapses. The study finds that monetary policy alone may not be enough to prevent asset price meltdowns, but lower interest rates can boost asset prices and steady-state output. Additionally, increasing the liquidity of capital may not always benefit individuals, even if it is sustainable. The research suggests that low policy interest rates may have encouraged the growth of "shadow banking".