Mumbai: With less than a fortnight left for bids for IDBI Bank to close, the field has narrowed to Prem Watsa’s Fairfax Holdings and Kotak Mahindra Bank. The absence of a broader bidding war reflects not a lack of capital, but the complexity of integrating technology, HR culture and branch networks.Both bidders face material integration challenges. For Kotak, the issue is largely operational. IDBI’s branch-heavy network would need rationalisation, adding to the already demanding task of technology integration. More importantly, IDBI’s credit-deposit ratio of about 87% makes it less attractive to a private bank that is primarily hunting for low-cost deposits rather than incremental loan assets.Fairfax’s challenges are deeper and more structural. The Canadian investor already controls CSB Bank, a smaller private-sector lender that runs on a different core banking system- Oracle’s Flexcube. Absorbing IDBI would force Fairfax into difficult choices.