...Support Drives IDRs: Qatar Islamic Bank (Q.P.S.C.)'s (QIB) Issuer Default Ratings (IDRs) are driven by an extremely high probability of support from the Qatari authorities, if needed. This reflects Qatar's strong ability to support its banks, as indicated by its rating, combined with Fitch Ratings' view that there would be a strong willingness to do so. QIB's Viability Rating (VR) reflects its strong franchise in Qatar, sound profitability and asset- quality metrics as well as adequate capital ratios, high liquidity buffers and low foreign funding. It also takes into account high balance-sheet concentrations. Well-Established Franchise: QIB has a strong and well-established franchise in Qatar, with a market share of about 10% of total banking system assets at end-1Q18. The bank's funding and liquidity have been less affected than some peers' by the diplomatic crisis, due to its stable retail funding profile. Sound Asset Quality: Asset-quality metrics compare well with peers'. QIB's non-performing...