Merchant Capital Partners, a regional investment bank, acts as a market maker for Vital Link Health Services and other small firms listed on an over-the-counter exchange. For those shares, Merchant acts as market maker (it trades for its own book), as well as engages in risk arbitrage trading. Merchant allows staff members to trade in shares once clients and the company have traded. Merchant recently obtained material nonpublic information regarding Vital's planned reverse takeover of a publicly listed competitor. In order to be in compliance with the CFA Institute Standards of Professional Conduct, which type of trading in Vital shares should Merchant least likely suspend