Recent data reveals private banks are facing sharper margin compression compared to public sector lenders due to aggressive FCNR deposit mobilization. The high cost of carrying these foreign currency funds without immediate deployment into high-yield assets created a liquidity drag. Investors may monitor how quickly these banks deploy these funds into loans, as management expects margin pressure to stabilize starting in the December quarter.
Indian private sector banks have seen a decline in their profitability metrics during the September quarter, largely due to a strategic move to aggressively mobilize Foreign Currency Non-Resident Bank (FCNR(B)) deposits. These deposits are funds held by non-resident Indians in foreign currencies. While this strategy helped these banks strengthen their deposit base, the execution led to a significant liquidity drag, resulting in a tighter Net Interest Margin (NIM) for several top private lenders.
The core issue stems from a timing mismatch. Private banks secured large volumes of these deposits, but the pace at which they could deploy this capital into higher-yielding loans was slower than expected. Because the money sat in lower-yielding assets while the banks still incurred the cost of carrying these deposits, the overall interest margins came under pressure. Public sector banks, which maintained a much smaller proportion of FCNR(B) deposits relative to their total base, managed to navigate this period with far more stability in their margins.
Financial data for the quarter highlights the disparity. Kotak Mahindra Bank recorded the most significant impact among major private lenders, with net interest margins falling by 44 basis points year-on-year to 4.1 percent. Axis Bank reported a 37 basis point decline. Larger players like HDFC Bank and ICICI Bank also faced margin compression, though to a lesser extent at 14 basis points and 12 basis points, respectively. In contrast, many public sector lenders showed resilience. Both Union Bank of India and Central Bank of India reported margin expansions, while Bank of India saw only a minor 6 basis point dip.
The strategy behind these inflows was to rapidly boost the deposit base, but the high reliance on FCNR(B) deposits—which made up 7.5 to 10 percent of the base for private banks compared to just 2 to 2.5 percent for public sector units—proved costly. This necessitated a shift in how these funds are managed. Bank management teams have described this as a transitional phase, noting that these funds are currently moving from temporary liquidity pools into active, higher-yielding loan books and repo-linked assets.
As this repricing cycle matures, treasury heads and analysts expect the margin drag to begin easing. While the December quarter may still show some lingering effects from the excess liquidity, the broader expectation is for a return to stability as these funds find more productive use in the economy. The key update for investors to watch in the coming quarters will be the speed at which these lenders convert this dormant liquidity into interest-earning assets, which will be critical to restoring margin levels.