Steer · Prudential sovereign bias
Zero risk weights for sovereign exposures
- What it is
- Bank capital rules assign a 0% credit-risk weight to claims on the home (or OECD) central government, so holding government bonds consumes no risk-based capital.
- Why it counts
- Makes government debt the cheapest asset for banks to hold in capital terms, tilting bank balance sheets toward the sovereign and lowering its funding cost.
When it was in force
- International: 1988 → 1998, historical; its end is not documented
- European Union: 2014 → now, in force
- United States: 2013 → now, in force; the rule may be older than the cited document
3 examples
International
1988 → 1998HistoricalIts end is not documented · As cited: from July 1988 (text as amended to April 1998)
Basel I set a zero weight for claims on OECD central governments (and on others' central governments in national currency).
Basel Committee, International Convergence of Capital Measurement and Capital Standards (Basel I), July 1988 (updated to April 1998), para. 36Primary source
“This decision has the following consequences for the weighting structure. Claims on central governments within the OECD will attract a zero weight”
European Union
2014 → nowIn forceExposures to EU Member States' central governments in their domestic currency carry a 0% risk weight regardless of rating.
European Union today: index 44.0Regulation (EU) No 575/2013 (Capital Requirements Regulation), Article 114(4)Primary source
“Exposures to Member States' central governments, and central banks denominated and funded in the domestic currency of that central government and central bank shall be assigned a risk weight of 0 %.”
United States
2013 → nowIn forceThe rule may be older than the cited document
US banks must assign a zero percent risk weight to exposures to the US government and its agencies.
United States today: index 42.912 CFR 217.32(a)(1) (Federal Reserve Regulation Q, standardized approach)Secondary source
“a Board-regulated institution must assign a zero percent risk weight to: (A) An exposure to the U.S. government, its central bank, or a U.S. government agency”
Examples and their dates reviewed .