Using a proprietary loan data set, we study how a large state-owned bank uses its internal ratings in loan granting decisions around China’s 2008 economic stimulus programme that relies on bank credit for financing. We find that there is little change in the rating process of the bank, and internal ratings remain a valid, albeit weaker, predictor of loan interest rates in the stimulus period. Weakened rating-interest rate relation is concentrated for borrowers from the industries that the stimulus programme focuses on, for state-owned enterprises (SOEs), for bank branches operating in provinces with a low level of credit market marketization, or when the credit rater and loan officer have no collaboration before. We also find that interest rates remain a valid predictor of ex-post loan outcomes in the stimulus period. Overall, there is no evidence that loan decisions of the state-owned bank are severely compromised in the economic stimulus period as speculated by some media. By showing how a state-owned bank maneuvers between supporting government stimulus initiative and maintaining market-based lending, we contribute to the limited literature on the roles of internal ratings in loan contracting decisions, and add to the debate over the roles of state-owned banks.