I don't understand why it should run to $7. If you bought shares at the close at $7.18, you would receive $5.64 in cash and 0.26 shares. If you sold those .26 shares on the open you would receive $1.67. 1.67 + 5.64 = $7.31, a profit of $0.13. There seems like there is no arbitrage profit to me...