Which of the following derivative contract features does not reduce counterparty risk? Multiple Choice Flexible forward contracts Standardized exchange-listed contracts Requirements to post margin Requirement to trade via a clearinghouse Operating profit margin is calculated as Multiple Choice (after-tax interest plus net income)/sales. net income/sales. net income/cost of goods sold. None of these answers are correct. Market value ratios indicate 1. whether the firm is using its assets productively; 2. whether the firm is liquid; 3. whether the firm is profitable; 4. how highly the firm is valued by investors Multiple Choice I only Il only II and III only IV only