Union Pacific (UNP) is up $3 to $58.06 after Berkshire’s (BRKA) buyout of Burlington Northern (BNI) sparked a rally in the railroad names Tuesday. UNP options activity is running 2X the average daily, with 14K calls and 7925 puts traded. The top trade was a a Jan 50 – 70 risk reversal sold 4000X on AMEX. The strategist collected 60 cents (sold puts) and the position was tied to shares at $58.05 (128K). Meanwhile, Nov 55 and 60 calls are actively traded as well, with some (buy-write) sellers taking advantage of today’s strength to collect premium (and also, some possible rolling from the 55s to 60s.)