PV01 is a method of describing interest rate risk.

Comprehensive and Detailed In-Depth Explanation:

PV01 (Present Value of a 1 basis point change) measures the change in a portfolio’s value for a 1 bp (0.01%) shift in interest rates, assuming a linear relationship. Its weakness is that it fails to capture non-linear effects (e.g., convexity) for large interest rate changes, where the actual value change deviates from the linear approximation. Option A is incorrect as PV01 ignores convexity, not overestimates it. Option C is false as PV01 is accurate for small changes. Option D is incorrect as PV01 is computationally simple. GARP’s FRR confirms this limitation in interest rate risk analysis.