Barry Ritholtz, Columnist

The Contrarian Signal in the REIT Breakout

Real estate investment trusts just got their own industry group in the Standard & Poor's 500 Index. It may represent a high-water mark for the sector.

Look closer.

Photographer: John Greim/lightrocket/getty images
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For the first time since 1999, the Standard & Poor's 500 Index is being reconfigured. The last time was when technology was established as an independent sector.

The current reconstitution of the S&P 500 involves breaking out real estate investment trusts (REITs) from the financial industry group. This is worth paying attention to, given how rarely these sorts of structural changes occur.