SPHB is the S&P 500 ETF for extreme market bulls almost akin to a leveraged fund. In selecting constituents for the underlying index, trailing daily price changes over the past 12 months is used to calculate the S&P 500 constituents betas. Such constituents are then ranked in descending order of their betas wherein the top 100 securities finally form the index. Its weighting methodology is also designed so each constituent is set proportional to its beta all these in an attempt to magnify market movements. While SPHB doesn't look much like the broad US large-cap space, it fulfills its high-beta mandate.