Because equity has fallen from roughly $39.7bn to $36.1bn on sustained repurchases while the price held near $402, the 20.84x P/B has risen partly through denominator contraction rather than re-rating on fundamentals, which investors should distinguish from genuine multiple expansion. The 2.49 PEG and 0.6% yield indicate the premium rests on earnings compounding rather than income, so any sustained deceleration in payments volume growth would likely compress the multiple faster than for a deposit-funded bank whose book value compounds independently of buybacks.

Applying a bank-style DuPont frame, the 6.4% ROA on 0.38 equity-to-assets produces the 16.8% ROE, meaning the improvement is more attributable to balance-sheet contraction than to a step-change in per-asset profitability; ROA itself rose about 110bp, roughly the same order as the leverage contribution. With fee income at 100% of revenue, the traditional NIM-times-leverage decomposition does not apply, and analysts should instead track operating margin and client-incentive ratios to judge whether profitability quality is genuinely improving or simply levered.

The persistently negative NIM readings confirm no meaningful interest-rate sensitivity in the earnings stream, so comparisons of Visa's NIM to depository peers would be analytically meaningless rather than merely weak. The efficiency ratio's 13.5%–50.0% range appears driven by the $16.1bn negative provision booked in 2026Q4 and elevated provisions in 2026Q3, which suggests underlying cost control remains intact but that headline efficiency figures should be normalized before judging operating leverage.

The 0.38 equity ratio still looks comfortable in absolute terms, but the direction of travel matters: total assets have declined to $94.4bn from a $100.0bn peak while equity fell to $36.1bn, so the book is shrinking faster than earnings accrue. Given that 2026Q2 distributions of $9.2bn exceeded that quarter's $3.0bn operating cash flow, investors should monitor whether continued repurchase pace forces reliance on the $1.2bn residual securities portfolio or on incremental debt, either of which would alter the capital-light profile.

Mastercard's 70.7x P/B alongside a 2.3% ROE appears to reflect a similarly small and shrinking book rather than a richer underlying franchise, so peer P/B rankings between the two networks are largely an artifact of capital-return policy and should not be read as relative cheapness. The more interpretable gap is against American Express, where 5.7% ROE and a 6.5x multiple reflect a lender taking credit risk, and against PayPal at 10.4x earnings with 23.8% ROE, which may indicate the market assigns a discount to non-network payment rails despite higher stated returns.