23. Dinco Stiphen purchased 100 shares of $75 stock on margin. The margin requirement set by the Federal Reserve Board was 40%, but Stiphen brokerage firm requires a total margin of 50%. Currently the Mock is selling at $62 per share. What is Stiphen return on investment before commission and interest if she sells the stock now? A) -40% B) -35% C) -17% 24. Mark Ritchie purchased, on margin, 200 shares of TMX Corp, stock at a price of $35 per share. The margin requirement was 50%. The stock price has increased to $42 per share. What is Ritchie return on investment before commissions and interest if he decides to sell his TMX holdings now? A) 40% B) 20% C) 10% 25. An investor buys 200 shares of ABC at the market price of $100 on full margin. The initial margin requirement is 40% and the maintenance margin requirement is 25% if the shares of stock later sold for $200 per share, what is the rate of return on the margin transaction? A) 400% B) 100% C) 250% anhas