Hallador Energy (HNRG) with an unusual options trade on 4/7 as 4500 December $6 puts sold to open $0.50 to buy 4500 of the $12/$20 call spreads at $1.70, net $1.20 debit for the bull spread with a $13.20 break-even and shares trading at $10.35. HNRG ...