While at a bar in the financial district after work, Ellen Miffitt, CFA overhears several employees of a competitor discuss how they will manipulate down the price of a thinly traded micro cap stock's price over the next few days. Miffitt's clients have large positions of this stock so when she arrives at work the next day she immediately sells all of these holdings. Because she has determined that the micro cap stock was suitable for all of her accounts at its previously higher price, Miffitt buys back her client's original exposure at the end of the week at the new, lower price. Which CFA Institute Standards of Professional Conduct did Miffitt least likely violate?