I am no expert at this but I will take a stab:
Federal flow through tax credit is 15%
B.C. provincial tax credit is 20% (NFG is a BC listed corporation)
$50,000,000 - 35% = $32,500,000
6,250,000 shares x $5.68/share = $35,500,000 which is a profit margin of $3 million for BMO
We will have to wait for these shares to clear before the upward momentum can resume.