Piper Jaffray analyst Michael Olson raised his price target for Priceline to $1,800 following the company's better than expected Q4 results. In a post-earnings research note partially titled "Path To PCLN $2K Continues," Olson attributes the Q4 upside to accelerating global room night growth. He continues to believe that Priceline is well positioned to capture an increasing share of travel bookings in the company's core international markets. The analyst views the Q1 outlook as conservative and keeps an Overweight rating on Priceline shares. The stock is up $57.49 to $1,689.50 in pre-market trading.