Operational Framework for Central Bank Foreign Exchange Interventions and Sterilization
Situation
Bangladesh Bank faces a dual macroeconomic challenge requiring immediate operational coordination. Buoyant expatriate remittance receipts alongside subdued import demand have created a pronounced structural mismatch between foreign exchange inflows and domestic dollar demand, placing sharp appreciation pressure on the domestic currency [The Business Standard, 10 September 2026]. To stem this currency appreciation, defend export competitiveness, and protect margins for expatriate remitters, Bangladesh Bank resumed foreign currency purchases on 1 September 2026 [The Business Standard, 1 September 2026], ending a pause in market buying operations that had been in place since 20 May 2026 [The Business Standard, 10 September 2026]. This intervention bolstered gross foreign exchange reserves, which expanded by nearly $5 billion [The Business Standard, 10 September 2026] over the preceding year to reach $36.33 billion as of 3 September 2026 [The Business Standard, 10 September 2026].
However, unsterilized dollar mop-up operations inject substantial local currency liquidity into a commercial banking sector already grappling with balance sheet stagnation. Private-sector credit growth dropped to 4.47% in June 2026 [The Business Standard, 10 September 2026], reaching its lowest level in 33 years [The Business Standard, 10 September 2026]. With private borrowing subdued, commercial banks have channeled idle liquidity into government securities, driving yields across all Treasury bills and bonds down into single digits [The Business Standard, 10 September 2026]. Because consumer inflation remained elevated at 8.26% in August 2026 [The Business Standard, 10 September 2026], well above the government target of 7.5% for FY27 [The Business Standard, 10 September 2026], persistent liquidity injections from foreign exchange interventions without systematic sterilization threaten to undermine price stability.
Evidence
Gross foreign exchange reserves stood at $36.33 billion as of 3 September 2026, reflecting an accumulation of nearly $5 billion over the preceding twelve months [The Business Standard, 10 September 2026].
On 1 September 2026, Bangladesh Bank conducted its first intervention purchase in more than three months, following the suspension of purchases after 20 May 2026 [The Business Standard, 10 September 2026]. The central bank mopped up $50 million from four commercial banks [The Business Standard, 1 September 2026; The Business Standard, 10 September 2026].
The purchase was executed at a cut-off rate of Tk 122.75 per US dollar [The Business Standard, 10 September 2026]. This cut-off was deliberately set above the prevailing market remittance rates, which traded between Tk 122.30 and Tk 122.60 per dollar [The Business Standard, 10 September 2026], establishing an administrative price floor.
Domestic private-sector credit growth slowed to 4.47% in June 2026, marking the weakest expansion recorded in 33 years [The Business Standard, 10 September 2026].
Leading commercial banks lowered interest rates by 1 to 2 percentage points in recent months [The Business Standard, 10 September 2026]. Average deposit rates adjusted to a range of 7% to 8%, while lending rates settled between 10% and 11% [The Business Standard, 10 September 2026].
Commercial banks redirected excess reserves toward sovereign debt, forcing yields on all maturities of Treasury bills and bonds down into single digits [The Business Standard, 10 September 2026].
In July 2026, Bangladesh Bank reduced its benchmark policy repo rate by 50 basis points to 9.5%, halting the monetary tightening cycle that had driven policy rates to 10% since 2022 [The Business Standard, 10 September 2026].
Consumer inflation registered 8.26% in August 2026, exceeding the official target of 7.5% established for FY27 [The Business Standard, 10 September 2026].
Prescription
- Institutionalize a transparent auction mechanism for reserve mop-ups (Responsible: Bangladesh Bank Forex Reserve and Treasury Management Department). Rather than conducting ad hoc purchases of $50 million across four commercial banks [The Business Standard, 1 September 2026], the central bank must establish predictable, multi-bank competitive auctions. The cut-off rate should be dynamically linked to prevailing market remittance rates of Tk 122.30 to Tk 122.60 per dollar [The Business Standard, 10 September 2026], avoiding rigid premium pricing above Tk 122.75 per US dollar [The Business Standard, 10 September 2026] that risks distorting price discovery.
- Deploy active open market operations to sterilize injected domestic currency (Responsible: Bangladesh Bank Monetary Policy Department). Dollar mop-up operations expand high-powered reserve money at a time when private-sector credit growth has slumped to 4.47% [The Business Standard, 10 September 2026]. The central bank must execute regular reverse repo operations and issue central bank bills to drain surplus bank balances, maintaining money market rates consistent with the 9.5% policy repo rate [The Business Standard, 10 September 2026].
- Rebalance government borrowing maturities to stabilize the yield curve (Responsible: Ministry of Finance Treasury and Debt Management Wing, in coordination with Bangladesh Bank). Because commercial banks have crowded into public debt instruments and driven all Treasury yields down into single digits [The Business Standard, 10 September 2026], the Ministry of Finance must lengthen the maturity profile of new issuances. Replacing short-term paper with longer-dated bonds will absorb commercial bank liquidity without pushing short-term sovereign paper to yields that fall below consumer inflation of 8.26% [The Business Standard, 10 September 2026].
- Maintain a pause on policy repo rate reductions (Responsible: Bangladesh Bank Monetary Policy Committee). Following the 50 basis point reduction to 9.5% in July 2026 [The Business Standard, 10 September 2026], the central bank must halt further interest rate cuts. With August 2026 inflation standing at 8.26% against the FY27 target of 7.5% [The Business Standard, 10 September 2026], and bank deposit rates already down to 7% to 8% [The Business Standard, 10 September 2026], additional policy easing would depress real returns and disincentivize domestic savings.
Risks and tradeoffs
Aggressive foreign exchange intervention without commensurate sterilization risks fueling inflation. When gross reserves stand at $36.33 billion after climbing by nearly $5 billion over the year [The Business Standard, 10 September 2026], pumping local currency into a banking system that has already seen lending rates drop to 10% and 11% [The Business Standard, 10 September 2026] threatens to entrench August 2026 consumer inflation of 8.26% [The Business Standard, 10 September 2026] well above the 7.5% target for FY27 [The Business Standard, 10 September 2026]. Conversely, comprehensive sterilization requires Bangladesh Bank to incur interest costs on absorption instruments, creating a fiscal burden on the central bank balance sheet.
A secondary tradeoff lies in sovereign debt pricing. With yields across all Treasury bills and bonds compressed into single digits [The Business Standard, 10 September 2026], sovereign yields risk falling below the prevailing inflation rate of 8.26% [The Business Standard, 10 September 2026]. This dynamic produces negative real returns on public debt, narrowing the margins of commercial banks whose deposit costs average 7% to 8% [The Business Standard, 10 September 2026], while private-sector credit demand remains frozen at a 33-year low of 4.47% [The Business Standard, 10 September 2026].
Bottom line
Bangladesh Bank must sterilize all local currency created from foreign exchange purchases at Tk 122.75 per dollar to prevent domestic liquidity from worsening consumer inflation that stood at 8.26% in August 2026 [The Business Standard, 10 September 2026]. Maintaining the benchmark policy repo rate at 9.5% will stabilize bank yields and preserve deposit viability while the central bank defends export and remittance competitiveness [The Business Standard, 10 September 2026].