What investors primarily want to know is which market, sector, or stock will outperform or underperform their benchmark. With that information, they can adjust their portfolio by overweighting or underweighting positions in an attempt to exceed their benchmark's performance.
For technical and quantitative analysts, the key concept here is "Relative Strength" (RS).
Through Relative Strength analysis, we can address questions like: "Which market will outperform or underperform another?", or "Which sector will do better than its benchmark or another sector?", and so on.
The good news is that Relative Strength analysis has long been a trusted tool for technical analysts. In fact, it was prominently featured in James P. O'Shaughnessy’s influential book, *What Works on Wall Street*.
The bad news is that traditional RS analysis often requires one-to-one comparison charts, leading to an overwhelming number of possible combinations. Even when limiting the scope to specific universes, such as S&P 500 sectors or individual stocks within a sector, you still end up needing to analyze numerous charts to gain meaningful insights.
For example, breaking down the S&P 500 into its 11 GICS sectors results in 121 possible combinations (11 x 11). Since there’s no need to compare a sector to itself, we can subtract the number of sectors, leaving 110 combinations. Furthermore, comparing Technology to Materials eliminates the need to study Materials against Technology, halving the number of charts needed to 55.
That’s just with 11 sectors. Imagine the complexity when dealing with a sector that has 50 or more stocks, or analyzing all members of the S&P 500 index—spoiler alert: it results in 124,750 possible combinations!