What happens when value turns into growth?

FTSE Russell’s mid-year reconstitution highlighted how quickly style exposures can shift, with Micron dropping out of the Russell 1000 Value Index and several megacap technology names taking its place.

The changes show that value and growth classifications are rules-based, but they are not always intuitive, since stocks can sit in both styles and move abruptly as prices and fundamentals change.

For investors, this matters because passive flows can create large mechanical reallocations, while active managers are judged against benchmarks that may not fully reflect their own definition of value.

The bigger lesson is that indexes remain useful tools for diversification and performance measurement, but their quirks also create opportunities for disciplined active strategies to add value when benchmark construction looks disconnected from economic reality.