The People’s Bank of China told the nation’s largest state-owned lenders to trim net interbank lending on June 12, aiming to keep short‑term rates from sinking below the benchmark. The move follows a recent policy push to curb a swelling cash surplus that has depressed funding costs across the banking system. Officials warned unchecked liquidity could spur risky arbitrage.

By ordering policy banks and the four mega‑state lenders—Industrial and Commercial Bank of China, China Construction Bank, Agricultural Bank and Bank of China—to curb net outflows, the PBOC hopes to tighten the overnight repo curve. A tighter curve should lift the 7‑day lending rate, easing pressure on profit margins for banks that have seen net interest income shrink as yields fall.

Liquidity tightening also curtails the cheap funding that propels shadow‑bank activity, a concern for regulators wary of systemic risk. Investors tracking Chinese banks may see tighter spreads and modest earnings rebounds, though any reversal depends on how quickly the cash glut recedes. The PBOC’s directive signals a shift from stimulus to stabilization. It also pressures bond yields upward, tightening financing conditions for corporates.