Sector SPDR and Index Rotation

Sam Stovall popularized sector investment and analysis in the mid-1990s. While investors can apply various fundamental and technical research techniques, the most objective way to evaluate performance of individual sectors is to compare them relative to each other.

Tracking the performance of all eleven Select Sector SPDRs against the benchmark S&P 500 Index provides us with information that can be used to detect rotation of these sectors within the S&P 500 Index.