But the poll results led to a 7 per cent drop in share prices on Monday. If he sells, then a huge block of Tesla shares will hit the market worth nearly $200 billion based on today's market price. When high-level executives sell such a huge number of shares, they use the so-called "blind" sales programmes, spreading the sales over a longer period to avoid any insider trading claims. Long-term capital gains face a federal tax rate of up to 20 per cent.