This is something that I have been talking about recently. It is a sign that:
 portfolio managers are taking their profits early so they can post good results at the end of the year
 the professionals are moderating their stock market positions because they see trouble ahead while the retail buyers are jumping in out of greedy desire to make a lot of money in what they think will be a continued rally — a ‘slam dunk‘ attitude — a legendary bad sign …
Last week, BAML’s hedge fund clients unloaded the most stock since 2008, while institutions and retail clients were net buyers.