This study explores the association between firm innovation and loan covenant strictness. We find that lenders construct stricter contracts for firms filing more patents, consistent with lenders imposing more oversight on firms when they enter the commercialization stage after having demonstrated their inventiveness. Our results hold under propensity score matching and entropy balancing, and when exploiting the American Inventors Protection Act as a shock affecting unrelated banks’ access to patent filing information. The relationship we document is stronger when the lender has more expertise and for firms with higher default risk. We demonstrate that borrowers’ patent filings are associated with more future R&D and capital investment and with a higher likelihood of their acquiring firms in the industry of their patent filings. Our results are consistent with the theoretical prediction that lenders interpret patent filings as indicative of high inventive potential that requires stricter discipline and oversight by lenders in order to be converted into actual business success, and with them designing debt contract terms accordingly.

ABSTRACT We study how proprietary information flows in strategic alliances facilitate banks’ information collection in private debt markets. We argue that lenders that have previously worked with a borrower’s alliance partners have an information advantage and show that firms entering a strategic alliance receive a lower interest spread on loans from banks that have previously lent to their strategic partners than loans from other banks. Cross-sectional tests on alliances’ economic importance and participants’ information environment support our hypothesis that the loan price effect is driven by reduced information asymmetry between borrowers and their partners’ relationship banks. Last, we find borrowers are more likely to obtain debt financing from alliance-related banks than from other banks. Overall, our findings are consistent with lenders that have previously worked with an alliance counterparty possessing debt contracting-relevant information about the soft nature of alliance value and the partners’ commitment to alliances. Data Availability: Data are available from the public sources cited in the text. JEL Classifications: G10; G21; G32.