Plain-English glossary
CET1 capitalCommon Equity Tier 1 — the bank's highest-quality shock absorber. Mostly retained earnings (profits kept, not paid as dividends) plus common shares issued. If the bank suffers massive losses, CET1 absorbs them first. The bank's own skin in the game.
Risk-weighted assetsNot all $1 of assets carries the same risk. A GoC bond is near-zero risk; an unsecured personal loan is high risk. RWAs adjust assets by their riskiness — a $1M mortgage might count as $350K of RWA, while a $1M personal loan counts as $1M.
CET1 ratioCET1 capital ÷ RWAs. The bank's safety buffer as a percentage. OSFI sets a floor for Canadian D-SIBs of ~11.5% including buffers. Higher above the floor = more capacity to grow loans, pay dividends, or absorb losses.
D-SIBDomestic Systemically Important Bank — OSFI's designation for Canada's Big 6 (Scotiabank, TD, RBC, BMO, CIBC, NBC). They face stricter capital requirements because their failure would destabilize the entire financial system.
Basel IV / regulatory capital
Better risk model = lower RWA per dollar of exposure
↓ RWA → ↑ CET1
Loan growth initiatives
More mortgages/loans → higher RWAs → compresses ratio
↑ RWA → ↓ CET1
Credit risk data quality
Cleaner PD/LGD data → more accurate IRB models
↓ RWA → ↑ CET1
Cost / efficiency projects
Higher retained earnings → builds CET1 capital over time
↑ capital via earnings
Pressure-test questions
Does this project grow RWAs — and has capital consumption been factored into the ROI?
If the project claims capital relief, which risk weight category is changing and by how much?
Has Treasury / Capital Management been consulted on the RWA and capital impact?