FYI: What's been unusual about this year's market ascent is not how much stocks have risen. A gain of 12% for the SPDR S&P 500 ETF (SPY) through seven months of the year, while impressive, is well within historical norms.
Rather, it's been the consistency and uniformity of the rally that has caught everyone off guard. In the ETF world, an investor could almost throw a dart and come up with gains. Everything from mega-caps to large-caps to midcaps to small-caps is up.
Regards,
Ted
http://www.etf.com/sections/blog/2017s-stock-market-cant-get-stranger?nopaging=1