SPY bull/bear dividers are marked on this daily chart with: 1. horizontal lines, 2. moving averages, and 3. Bollinger Bands
placed on several chart elements in this single chart
* November 2017 through late January 2018 saw the 100 very largest market capitalization stocks represented by the S&P 100 index leading the entire 500 symbol set in the S&P 500 index price action, which was not a healthy foundation for a lasting price advance ( a negatively divergent internal vs. the record price levels for SPY )
the use of the SPXEW:SPX ratio is about measuring the degree of price participation by the 500 symbols vs. by the 100 largest market cap. symbols contained within the S&P 500 index
Important Note - the SPXEW:SPX ratio is approaching its 2017-2018 low, and this reflects an unhealthy development for the potential staying power of a lasting price advance, since a minority # of stocks in the weighted S&P 500 index are carrying the bulk of the daily % price change during the current price bounces
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