VMBS: Hold Rating Reflects Adequate Carry With A Negative Convexity Tax

Vanguard Mortgage-Backed Securities ETF is rated Hold due to inferior risk-adjusted returns versus alternatives like AAA CLOs, despite its ultra-low 0.03% expense ratio. Agency MBS benefits from improved macro tailwinds—ending of quantitative tightening, GSE purchases, and returning bank demand—but these positives are largely priced in. VMBS's negative convexity and 4.15% yield are not sufficiently compensated versus floating-rate CLO ETFs, which offer higher yields, near-zero duration, and positive convexity.