Remember July 2011?

 | Jul 29, 2015 01:22AM ET

According to Bloomberg data, the modest year-to-date increase in the S&P 500 is attributable to health care and retail alone. Worse yet, the two industry segments trade at a 20% premium to the market at large. Paying a premium for growth is one thing. Chasing a handful of momentum stocks is another.

Brokerage firm Jones Trading sharpened the knife even further, noting that six corporations account for more than the entirety of the meager 2015 gains in the S&P 500. Those companies? Amazon (NASDAQ:AMZN), Apple (NASDAQ:AAPL), Facebook (NASDAQ:FB), Gilead Sciences (NASDAQ:GILD), Google (NASDAQ:GOOGL) and Walt Disney Company (NYSE:DIS). The narrowing of the market itself coupled with the types of businesses on the list (with the possible exception of Walt Disney) strongly resembles late 1990s euphoria.

What happens when one examines the S&P 500 on an equal-weighted basis? We find that that stocks have been stuck in one of the tightest trading ranges in market history for as long as the Federal Reserve ended quantitative easing (“QE3″). Here is the performance of the Guggenheim Equal Weight S&P 500 ETF (NYSE:RSP) since QE3 wrapped up at the end of October in 2014.