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Sector Rotation

Sector rotation is the practice of shifting capital among market sectors as economic conditions, interest rates, and risk appetite change, rather than holding a static mix of stocks. The market is typically divided into cyclical/growth sectors — technology, consumer discretionary, industrials — that thrive when growth expectations are rising and risk appetite is high, and defensive/value sectors — healthcare, consumer staples, utilities, and often energy — that hold up better when investors turn cautious or when a specific input cost (like oil) is moving in their favor. The mechanism is straightforward: institutional money is always positioned somewhere, and when a catalyst changes the relative attractiveness of one group versus another, funds reallocate rather than simply adding or withdrawing cash from the market as a whole. That's why an index can be roughly flat while the stocks underneath it move sharply in opposite directions — the index return masks a rotation happening beneath the surface. Rotations are typically triggered by shifts in interest-rate expectations (higher rates hurt long-duration growth stocks more than value), macro data surprises, commodity price moves, or a re-rating of a popular investment theme once its valuation runs ahead of the evidence supporting it — as is happening now with AI infrastructure spending. Traders watch sector rotation because it often reveals what the market actually believes about the economy faster than any single index level does.