Liquidity in the interbank market falls nearly 19% in a single session as yield curve eases
Overnight liquidity in Sri Lanka’s banking system contracted sharply on Tuesday, falling to LKR 165.38 billion from LKR 204.74 billion in the previous session — a decline of roughly 19% in a single trading day.
The contraction came even as government securities yields eased across the curve and a weekly Treasury bill auction was fully subscribed at lower rates, suggesting that tighter overnight funding conditions have not yet fed through into higher borrowing costs at the short end of the yield curve.
Excess liquidity in the system has trended in a relatively narrow band over recent weeks, and Tuesday’s decline represents one of the larger single-day movements in that period. The banking sector’s holdings of government securities have remained broadly stable, with total outstanding government securities held by the Central Bank little changed week-on-week.
The liquidity contraction coincided with a Treasury bill auction in which the Public Debt Management Office raised its full offered amount of LKR 140.0 billion, with the 3-month and 6-month tranches fully allotted and weighted average yields declining across all tenors.
For now, the tightening in overnight funds appears to be a single-session movement rather than the start of a sustained trend, though it is a data point worth monitoring in coming sessions, particularly if it persists alongside continued yield declines elsewhere on the curve.
Key Numbers
| Metric | Value |
|---|---|
| Overnight liquidity (today) | LKR 165.38 billion |
| Overnight liquidity (previous session) | LKR 204.74 billion |
| Single-day change | -LKR 39.36 billion (-19.2%) |
| T-bill auction total raised | LKR 140.0 billion (fully subscribed) |
| 6M T-bill yield | 9.99% (-22bps) |
Business Impact
Tighter overnight liquidity conditions can influence short-term funding costs for banks and, by extension, the rates available to businesses relying on short-term credit facilities. While Tuesday’s decline has not yet translated into higher yields, corporate treasurers and finance teams managing short-term borrowing or cash positions may want to watch whether the contraction persists into subsequent sessions, as sustained liquidity tightening can eventually put upward pressure on short-term lending rates even as government securities yields move in the opposite direction.
Source Attribution
Source: Central Bank of Sri Lanka statistics and publicly available market information.