My theory is to wait for large fortune 500 type companies to collapse in price after a scandal then buy
Next sell the exact number of shares required when a price rise occurs due to a government bail out to reimburse the original cost of purchase so that you are at 0 profit & 0 loss but own more shares
Might not work because the cost of taxes & regulations prevent net profits
I am not giving investment advice nor suggesting to do it
I do not invest because of regulations