Network Hash Rate = 450 Th/s
Mine Hash Rate = 50 Th/s
50 * 100 / 450 = 11.11%
Blocks/Round = 2016
Bitcoin/Block = 25 BTC
Bitcoin/Round = 2016 * 25 = 50,400 BTC
50,400 * 11.11% = 5,599.44 BTC
5,599.44 BTC / 10,000,000 shares = 0.00055994 BTC per share per round.
So, even if Labcoin had 50 Th/s right now, divs (twice a week) from mining would be about 0.00013 BTC.
Or about 0.00028 per week. 80% of that is 0.000223976 per week, which is about 9% of share price of 0.00248 ... per week