There is a fine line between manipulation and smart trading. It's not so much the funds as it is the way the market is setup. Only 1/2 of 1 percent of the stock is traded yet the price can change 5%. It's almost axiomatic that the stock can be fudged(manipulated) to get the best price. How could a fund buy or sell 300K without sending the stock into a whirlwind. Looking at it from a different perspective one might consider the motive for all this. If it's to make a gain based on manipulaTion alone I might have an issue. However what if they are seeking a long position at a good price, now they are doing nothing more then the rest of just, just better.