1. Which of the following statements can be considered market manipulation?
   1. A brokerage promotes stocks of a firm as prospect of good return when the firm is actually under SEC investigation
   2. A mutual fund sells an unusually large amount of IBM stock to avoid future losses
   3. High frequency traders using high speed computers can take advantage of minute changes in stock buy-sell margins instantly before discrepancies fall back into the normal range
   4. The CEO of a failing firm affirms the firms rosy forecast right before the facts come out
   5. None of the above