Market efficiency Cameron just saw a news conference on TV announcing that Baker Pharmaceuticals is receiving approval from the U.S. Food and Drug Administration (FDA) for the marketing of a new drug. The product is expected to be a breakthrough for the firm. Cameron immediately instructed his broker to buy 1, 000 shares of Baker's stock. In the following table, indicate whether Cameron could earn above-average returns (and thereby beat the market) under each of the following levels of informational efficiency