On April 30, 2026, the Dhaka Stock Exchange downgraded Islami Bank Bangladesh PLC — the country’s largest shariah-compliant lender — to Z-category alongside Standard Bank and SBAC, both conventional. Three days later, 10 more banks joined the junk list. By mid-May, 15 of the 36 banks listed on the DSE were trading in a category where margin loans are prohibited and institutional money will not follow.
For two decades, the case for Islamic banking on the DSE has rested on a structural claim. Interest-free, asset-backed lending was supposed to produce safer balance sheets than conventional credit. The shariah board was supposed to function as a second risk-management layer. Investors who screened for compliance were supposed to get protection along with principle.
The Z-category list tested that claim in real time. The list did not discriminate.
The Downgrade That Did Not Discriminate
Islami Bank failed to declare a dividend for FY2024 and FY2025. So did Social Islami Bank. So did Standard Bank and SBAC. The trigger for Z-category placement is the same regardless of business model — two consecutive years without a dividend payable to shareholders. Behind that mechanical rule sits the more important number.
Islami Bank’s bad loans climbed 44% in 2025 to a record Tk 94,322 crore. The Daily Star put the figure above Tk 1,00,000 crore by September. The bank reported a Tk 288 crore loss in Q1 2026. Net asset value per share slipped from Tk 44.31 to Tk 42.56 in a single year. Bangladesh Bank had to grant a 20-year deferral on a provisioning shortfall of Tk 86,000 crore — a number large enough that conventional capital adequacy rules simply do not contemplate it.
This is not what the structural argument for Islamic banking predicted. The reason is not the model. It is who came to own the model.
The Capture That Turned Shariah Into Branding
S Alam Group, under the political cover of the previous Hasina-era government, took over more than half of Islami Bank’s total loans. The pattern repeated across the sector. EXIM Bank, Social Islami Bank, First Security Islami Bank, Global Islami Bank, and Union Bank — all five of the banks now being forcibly merged into the new entity Sammilito Islami Bank — were linked to the same group’s loan irregularities. Bangladesh Bank dissolved their boards in November 2025 and appointed temporary administrators. The former Islami Bank managing director was arrested in June 2025 in connection with a Tk 1,092 crore loan scam.
When concentrated ownership routes loans to related parties, the shariah board becomes a stamp. The asset-backing requirement becomes paperwork. The structural advantage becomes a marketing line on the website. By the time the regulator intervenes, the difference between a captured Islamic bank and a captured conventional bank is purely cosmetic. That cosmetic difference is what investors were paying for.
The Conventional Banks That Quietly Outperformed
Set against that picture, look at BRAC Bank. Tk 1,432 crore in profit in 2024 — a record, and the bank’s first appearance in the Tk 1,000 crore profit club. Dividends paid consistently, with a payout ratio of 16.44%. City Bank crossed the same Tk 1,000 crore profit threshold in the same year and reported a 162% Q1 surge in May 2026. Pubali Bank’s profit rose 43% year-on-year in the first nine months. Jamuna Bank grew 18%.
None of these banks are shariah-compliant. All of them passed the test the Z-category rule actually measures — earnings strong enough to support a dividend in a sector where more than half of listed banks could not.
The DSES (DSEX Shariah Index) underperformed the broad DSEX through 2024-2026, weighed down by IBBL and the merger-target banks. That is what the structural divergence looks like as an index number. Not a story about religious finance failing as a discipline. A story about who was allowed to operate the discipline.
What This Tells DSE Investors
Two Islamic banks have not appeared on the Z-category list. Al-Arafah Islami Bank avoided the downgrade. Shahjalal Islami Bank is raising a Tk 600 crore bond to strengthen its capital base. Both run outside the S Alam orbit. The model itself is not in evidence as the problem.
The problem is governance. The lesson is screening discipline. Shariah-compliance is a screen. It is not a substitute for evaluating individual bank governance, NPL trajectory, related-party loan exposure, and provisioning adequacy. An investor who bought IBBL in 2020 because it was shariah-compliant and held through April 2026 has lost more than someone who bought BRAC Bank on conventional fundamentals and never opened a compliance report.
The Z-category list of April 30 was a sorting mechanism. It sorted by dividend, but the dividend was a function of earnings, and earnings were a function of who controlled the lending desk. Fifteen of 36 banks failed that test. The shariah label appeared on both sides of the line. The line itself was drawn somewhere else entirely.