David Katz, an equity analyst with New York-based Jefferies Group, in a weekly report on gaming, lodging and leisure companies, updated his Thursday assessments of MGM and Caesars Entertainment Inc. that included an estimate that MGM could take a 10 percent to 20 percent hit on revenue and cash flow "for the days that the current conditions exist." MGM on Sunday entered its second week of operations after a cybersecurity breach. Jefferies analysts say MGM generates about $42 million in revenue and $8 million in cash flow daily companywide.