lisa crocker, cfa, manages several pension accounts and directs most of her trades to zeta brokers, which provides excellent trade execution as well as equities research. regional brokers, which also has excellent trading services, has offered to execute trades for crocker at half the commission rate she pays zeta, but regional does not supply equities research. if crocker declines to switch her business from zeta to regional, has she violated any cfa institute standards of professional conduct?