That's one thing that will make blockchain trading interesting as it's discreet block by block, such as the ex-dividend date who holds a stock when the dividend

That's one thing that will make blockchain trading interesting as it's discreet block by block, such as the ex-dividend date who holds a stock when the dividends are paid, might make fees for that block very competitive. The SEC is really struggling now with good regulation but it's coming end of the year to draw the line in the sand.