Could be China raising bank reserve ratios, which they've now done twice this year. Also, there's an underlying current of the US market being pretty high. Lately it's felt like we've been expecting it to drop and it hasn't...yet. So any excuse to correct a bit.
its because we look for reasons why things happen in the market that we are blinded by the truth.. the truth that is so simple to all of this madness. markets will go up when they go up and down when they go down. trying to anticipate or even think you can predict it because of some reason or the other is the biggest mistake you can make. thats my 2c worth