Abstract
This paper assesses the relationship between risk-shifting of mutual funds, measured as benchmark-adjusted factor-based investment style change following a structural break, and their risk-adjusted performance. We isolate only the breaks in style risk beyond those embedded in the funds’ benchmark index to eliminate any natural style risk changes resulting from varying company fundamentals over time. We group style risk changes into extreme (style rotation), moderate (style drifting), and weak (style-strengthening/weakening) and assess which investment style category is most profitable to shift in to and out of. Our findings show that funds that exhibit breaks generate overall better risk-adjusted performance than those that do not. Funds that are most successful in risk-shifting have statistically and economically distinct risk-adjusted performance, make shifts towards small/large/value/growth style combinations rather than mid-cap and blend style, exhibit breaks less frequently, and have more moderate risk-shifts than funds that are unsuccessful.
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