Market concerns

Three factors continue to hover over the markets:

1. Concerns that China's economy is slowing faster than its government has said.

2. Uncertainty over whether the U.S. Federal Reserve will raise its benchmark interest rate in September.

3. The effect of cheap oil, which has dropped to its lowest point in over 6 years.

Through all of this, it's worth remembering that U.S. stock indexes had hit record highs earlier this year, after logging double-digit gains in each of the last three years.

Arguably, the U.S. stock market was heating up, and weak company earnings weren't lining up with high stock prices.

The best explanation is over heating.  U cant blame china, since we are all at blame since we are all connected in the same global economy, each having our own influences.  The fed reserve and cheaper oil make an economy or market  vulnerable but they are not to blame either.  People have bought all they could buy and some need to sell to get money back, or overheated, is the real reason for this global selloff.