Stocks started strong today following news from the ECB, but were unable to hold on to the momentum. The Dow 30 lost 5 points (-0.03%), the S&P 500 was flat (0.02%) and the Nasdaq 100 lost 12 (-0.26%).Expedia (EXPE  )Enjoyed a 3.49% pop today as Piper Jaffray upgraded the travel site to overweight from neutral and boosted its price target to $140 per share from $130, implying an upside of 32.5%. Analyst Michael Olson cited Expedia's acquisition of HomeAway and growth potential in its core business as two reasons for the upgrade.

Twitter (TWTR  ) Sold off 5.95% today after the social media company says its offering additional restricted stock and cash bonuses in an effort to retain top talent. This news was according to The Wall Street Journal.  

Recent IPO Square (SQ  ) Suffered a 6.07% decline today despite posting quarterly revenue of $347 million, topping analysts' expectations in its earnings report as a publicly-traded company. Square, which is run by Twitter founder and CEO Jack Dorsey, projects that it could earn as much as $12 million in earnings on an adjusted basis this year.

Lastly, Amazon (AMZN  ) lost 0.10% following the news that the company is looking to operate its own cargo planes. Air cargo transportation provider Air Transport Services Group (ATSG  ) announced that Amazon has agreed to lease 20 Boeing 767 planes for five to seven years. ATSG enjoyed another positive day today gaining 4.81%.