Fidelity Fundamental Small-Mid Cap ETF earns a 'Buy' rating based on its strong recent momentum, superior risk-adjusted returns versus passive benchmarks, and attractive valuation. FFSM's active management and diversified holdings position it to benefit if market leadership broadens beyond mega-cap technology stocks. While FFSM has a higher expense ratio (0.43%) and weak dividend profile, its risk-adjusted outperformance and growth/value blend justify its use as a satellite allocation.