For example, the Goldman Sachs monetary-conditions index (based on a weighted average of short-and long-term interest rates and the trade-weighted exchange rate) suggests that America's monetary policy is currently at its tightest since 1989, largely reflecting the strong dollar.

ECONOMIST: The stockmarket economy

The 500 stocks that make money consistently each of the last four quarters are weighted based on their daily standard deviation over the last 180 trading days, compared to their average.

FORBES: Making Stock Volatility Work For The Long-Term Investor