"Reuters) - Brokerage Newedge USA LLC has agreed to pay a $9.5 million fine to settle allegations by FINRA and U.S. stock exchanges that it failed to adequately monitor and prevent "potentially manipulative and suspicious trading activity" by high-speed traders on U.S. stock markets...." http://www.reuters.com/article/2013/07/10/us-newedge-fine-idUSBRE96910N20130710
Shouldn't one of the poll choices be "of course"? But let us recognize there are several legal means of manipulating prices available to those with big pockets and the media's ear. This is just an everyday part of the stock markets that has always been with us.