Wall Street’s biggest firms, facing a slump in investment-banking revenue, are considering freezing compensation levels for some junior bankers, people familiar with the deliberations said. Credit Suisse Group AG is likely to suspend its practice, an industry norm, of boosting pay automatically each year for analysts, associates and vice presidents within the investment- banking division, a person with direct knowledge of the decision said. While those employees will get their regular annual salary increases, bonuses probably will be lowered to keep total pay flat from a year earlier, said the person, who requested anonymity because the plan isn’t public.