What does it tell you though? If someone has 50% of say Google from the start, them selling it all over say 5 years would put the cost basis way up, but withou

What does it tell you though? If someone has 50% of say Google from the start, them selling it all over say 5 years would put the cost basis way up, but without changing much in the economy or in those companies. They would probably in turn buy other stocks and increase their cost basis. Interesting Q though!