I didn't dive deeply into this data, but it doesn't sound like we even need to find 536 idealists. If you sort by number of trades descending, it becomes less

I didn't dive deeply into this data, but it doesn't sound like we even need to find 536 idealists. If you sort by number of trades descending, it becomes less than mine very quickly (I buy 4 mutual funds once a month, automatically). If you sort by value of trades descending, it looks like there are only a handful of officials with any meaningful amount of money in the stock market. (For some value of meaningful; there is an example in there about a $50,000 trade, and it just doesn't seem like very much money to me. 50 million dollars, get out that microscope. $50,000? Doesn't change anyone's life, so not really worth being corrupt for.)