Bollinger Bands spread at 14-year high for S&P500

Bollinger Band analysis for the S&P500 shows the spread between the upper and lower bands has now increased to 639 points, the highest level in 14 years, says Peter Lee at UBS. Although there is no other evidence for a top, the index is susceptible to a sharp downwards correction. Read also his FX, commodities and bond analysis.

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