What's the average tenure of a cmo?

The average term of marketing managers at major American advertisers is just 3 years and 4 months, according to a recent study by Spencer Stuart. While CMO failure or dissatisfaction may be a common explanation for CMOs' shorter terms of office, considering rotation as something purely negative risks overlooking the benefits, and executives may misunderstand it if they don't fully understand it. While CMO failure and dissatisfaction are still common factors for a short term in CMOs, understanding all the reasons can help CMOs, CEOs, and others to better interpret the data.