The financial markets generally are unpredictable. The idea that you can actually predict what's going to happen contradicts my way of looking at the market.
George Soros
Wall Street’s graveyards are filled with men who were right too soon.
William Hamilton
In the stock market, those who expect history to repeat itself exactly are doomed to failure.
Yale Hirsch
No matter how good the science gets, there are problems that inevitably depend on judgement, on art, on a feel for financial markets.
Martin Feldstein