1. In the Swiss Interest Rate Derivatives case, a central part of the finding was that the cartel members conspired to increase the bid-ask spread. https://ec.europa.eu/competition/antitrust/cases/dec_docs/39924/39924_1156_3.pdf
   1. Define the bid-ask spread.
   2. What tradeoffs would a cartel confront in deciding on the magnitude of the bid-ask spread?
   3. There are other "Over the Counter" markets in which the cartel firms are key participants. What potential lessons would these firms take away from the Swiss matter regarding collusion in other OTC markets, both in terms of cartel conduct as well as avoiding detection by antitrust authorities?