Question 18 (3.333 points) Sandra bought 1000 shares of XYZ stock at $50/share using 50% initial margin. If the stock instantly dropped to $40/share,what would be the relationship between Return on Investment for a cash purchase as compared to the purchase on margin? There would be no difference in ROI using margin vs. a purchase with cash The ROI using margin would be worse than the ROI on a cash purchase The ROI using margin would be better than the ROI on a cash purchase