Several Wall Street analysts on Wednesday hiked their price targets for Amazon.com (AMZN), with one citing the Web retail giant's increasing market share. Benchmark Co. analyst Daniel Kurnos increased his target to 310 from 260. Kurnos rates Amazon a buy. Bank of America upped its price target to 300 from 274, maintaining its buy rating, according to tracker Analyst Ratings Network. ARN also said Goldman Sachs initiated coverage on Wednesday, with