Sri Lanka’s three-month Treasury bill yield slips under the 7.75% Overnight Policy Rate as excess liquidity floods the banking system, reshaping the government debt market and signaling a major shift in monetary conditions.
Three-month Treasury bills fall beneath the 7.75% OPR as market cash piles up, signaling a dramatic shift in government debt dynamics.
Sri Lanka’s Treasury bill yields have now declined for a fifth straight week, and the signal from the bond market is unmistakable. For the first time in this cycle, the three-month T-bill yield has dipped below the Central Bank of Sri Lanka’s Overnight Policy Rate of 7.75%. In normal monetary conditions, short-term government securities tend to align with or stay above the policy rate. When they slip beneath it, the message is clear. Liquidity is abundant, and market forces are pushing yields lower.
According to the Central Bank of Sri Lanka, system liquidity stood at Rs. 282.4 billion as of 18 February. Although that figure is slightly down from Rs. 296.5 billion recorded a week earlier, it remains dramatically elevated compared to the Rs. 66 billion seen in mid-December 2025. In practical terms, liquidity has more than quadrupled in just two months. Analysts widely attribute the fall in Treasury bill yields to this flood of excess cash circulating within the financial system.
Dimantha Mathew, Chief Research and Strategy Officer at First Capital Holdings, told The Sunday Morning Business that the decline in yields reflects both subdued private sector credit growth and aggressive foreign exchange operations by the central bank. The CBSL has been purchasing significant volumes of US dollars, effectively injecting rupee liquidity into the domestic market. In the most recent period, the central bank bought $200 million. Official data further show that in December 2025 the bank purchased $272.5 million and sold $18.8 million, followed by purchases of $209.8 million and sales of $9.5 million in January 2026. Compared to January 2025, these transactions represent a sharp escalation in foreign exchange intervention.
The Treasury bill auction results reinforce this liquidity narrative. The Public Debt Management Office received bids totaling Rs. 172.3 billion against an offer of Rs. 60 billion, highlighting strong investor appetite for government securities. For three-month bills, Rs. 10 billion out of Rs. 30.2 billion in bids were accepted at a Weighted Average Yield Rate of 7.66%, down six basis points from the previous auction. Six-month bills saw Rs. 35 billion accepted from Rs. 97 billion in bids at a WAYR of 7.99%, down eight basis points. Meanwhile, Rs. 15 billion out of Rs. 45.2 billion in 12-month bill bids were accepted at a WAYR of 8.27%, marking a four basis point decline.
Taken together, these developments point to a fundamental shift in Sri Lanka’s monetary and financial markets. Extraordinary liquidity injections, slowing private credit expansion, and heightened demand for short-term government debt are compressing yields across maturities. When Treasury bill yields fall below the policy rate, it reflects market confidence that liquidity conditions will remain loose in the near term.
The broader implication is that Sri Lanka’s interest rate environment is entering a new phase. With strong demand for government securities and ample cash in the banking system, the debt market is signaling easing financial conditions. Whether this trend persists will depend on credit growth, foreign exchange flows, and future Central Bank policy decisions.
