I show that issuing credit cards helps the bank compete for retail deposits in China. When credit card growth increases by 1%, retail deposit growth is expected to rise by 0.2% with regard to peers next year. This effect is stronger for small joint-stock banks compared with big state-owned banks. This is realized by introducing new credit card holders to visit the branch and open a savings account. DID test shows that after a shock that tightened new account opening, banks with higher credit card growth experienced a harsher decline in retail deposit growth. This paper highlights the customer introducing benefit of credit card promotion, which can provide an alternative explanation for the intensified competition in the credit card market in China. It also unveils the strategy that small banks can use to compete for the deposits of big state-owned banks, who intrinsically has more branches and retail customers.

Deregulation may increase bank stability. Employing China’s loan-to-deposit ratio (LDR) reform in 2015, we show that the deregulation of the LDR increases the stability of banks. Specifically, the deregulation of the LDR alleviates banks’ deposit competition, and decreases reliance on customer deposit funding. By doing so, it improves the loan structure among banks with a high LDR, which, in turn, increases the on-balance-sheet stability of these banks. Meanwhile, the deregulation of the LDR curbs high-LDR banks’ impulse to issue principal-floating wealth management products, a form of shadow banking, which thus increases their off-balance-sheet stability.

We study the causes and consequences of growth in shadow banking by examining the Chinese banks’ issuance of Wealth Management Products (WMPs), which are short-maturity off-balance-sheet substitutes for deposits. Using branching overlap data, we instrument deposit availability with banks’ exposure to competition from a large state-owned bank, which substantially increased loan supply to support the fiscal stimulus during the Global Financial Crisis and competed more aggressively for deposits thereafter. We show that deposit market competition has a causal effect on smaller banks’ reliance on shadow banking: exposed banks increased the issuance of WMPs sharply, creating rollover risk for these banks.

Based on the background of the banking industry in China, this paper establishes Cournot, Bertrand and Stackelberg mixed oligopoly competition models with deposit and interest rates as strategic variables between a representative state-owned bank and a representative foreign bank. We discuss and compare the equilibrium deposits, interest rates and profits in different market structures. More importantly, considering the endogenous timing setup and taking the extended game with observable delay as the basic model, we analyze the competition results of the mixed duopoly at different market structures and make numerical simulations in order to get the outcomes of the extended game. It is found that, in the deposit competition with endogenous timing, if two banks have the same deposit return rate, the simultaneous move could become the final result; If the deposit return of the foreign bank is more than twice that of the state-owned bank, all SPNEs of the extended game are sequential, i.e one bank will lead, the other will follow. If the state-owned bank’s profit in Cournot is larger than that of the state-owned bank as the Stackelberg follower, the only SPNE will be (E, L), i.e. the state-owned bank will lead and the foreign bank will follow. Additionally, in the interest rate competition with endogenous timing, if the degree of nationalization is no larger than 75% as well as two banks have the same deposit return rate, the final SPNEs of the extended game are sequential and the simultaneous move can not become the SPNE.