Stock traders know what those indices mean and how to understand and explain its fluctuation based on the mixed information only if the market is running by its basic rules. So many people have been confused by the US housing market during 2001~2007 because it had been growing along a very abnormal and dangerous curve. Who was behind this curve? Now oil becomes the next tool that makes another turmoil. If you think the oil price is still fluctuating based on the market news, I would have to say you'd better look at the stock history and think again.