We explore the market for lending to start-ups and two mechanisms that facilitate trade within it: (1) the salability of patent collateral and (2) the credible commitment of equity investors. Intensified trading in the secondary patent market is strongly related to lending, particularly for start-ups with more redeployable patent assets. Utilizing the crash of 2000 as a severe and unexpected capital supply shock for venture capitalists, we further show that lenders continue to finance start-ups with recently funded investors better able to credibly commit to refinance their portfolio companies while withdrawing from otherwise promising projects that could have needed their funds the most.