1. The Constitutional Mandate for Financial Stability

Article 40 CE - Full Employment and Economic Stability

Public powers shall promote favorable conditions for social and economic progress and for more equitable distribution of income. Shall carry out policy aimed at full employment.

TC interprets this as mandate to prevent systemic financial crises that destroy employment. Basis for countercyclical policy.

Article 130 CE - Modernization of Economic Sectors

Public powers shall attend to modernization and development of all economic sectors.

Used to justify State intervention to restructure banking sector (cajas, SAREB).

Article 131 CE - Planning of Economic Activity
Allows State to plan general economic activity by law to meet collective needs, balance and harmonize development. Legal basis for macroprudential planning, e.g., countercyclical buffer plan.

Article 149.1.11 and 13 CE - Exclusive State Competence - The Core Safeguard

11: bases of ordering of credit, banking and insurance
13: bases and coordination of general planning of economic activity

Purpose: preserve unity of Spanish financial system. TC doctrine:

• STC 1/1982, STC 135/1992: Definition of "bases" - State must set minimum common regulation for solvency, liquidity, systemic risk.
• STC 235/1999 - Valencian Cajas Case: Law vested supervisory authority in local entity, Valencian Institute of Finance, arm of regional government without supervisory capability. TC annulled. Held arrangement weakened Bank of Spain which retained ultimate responsibility for financial stability. Establishes that macroprudential powers cannot be regionalized.
• STC 91/2013, 101/2015, 141/2015: Uphold FROB and resolution powers as bases. Autonomous Communities cannot veto mergers or resolution supported by Bank of Spain.

Article 135 CE - Budgetary Stability - Reformed 27 September 2011
Most important reform since 1978. Inserted due to Euro crisis.

Text: All public administrations will conform to principle of budgetary stability. No deficit beyond EU limits.

TC use: In recent decisions when deciding on constitutionality of previous Laws on Budgetary Stability, used new Article 135 to dismiss any doubt of unconstitutionality. In other words, financial stability is now constitutional principle of same rank as social rights.

Implications:

• Allows limits on autonomous spending to prevent sovereign-bank doom loop
• Justifies extraordinary levies on banks to fund resolution (FROB, SAREB losses)
• Constitutional basis for ESM MoU of 2012 - Spain accepted specific measures to reinforce financial stability under EU Decision 443/2012 based on Art 136 TFEU

Article 93-96 CE - EU Integration
Allows transfer of powers to ECB, ESRB, Single Resolution Board. Spanish TC accepts that ECB can top-up national macroprudential measures (Regulation 1024/2013 Art 5) via Art 93.

2. Institutional Safeguards Created by Law Under Constitution

A. Banco de España - Article 97 + 103 CE Independence

Law 13/1994: Independent administrative authority. Autonomy protected to implement macroprudential measures without political cycle.

Functions under Law 10/2014 on regulation, supervision and solvency:

• Countercyclical Capital Buffer (CCyB)
• G-SII, O-SII buffers
• Systemic Risk Buffer (SyRB)
• Borrower-based limits: LTV, DSTI, maturity - introduced via RDL 22/2018

Under SSM, Banco de España is within Eurosystem. ECB can impose stricter measures.

B. AMCESFI - Macroprudential Authority Financial Stability Council

Created by Royal Decree 102/2019 of 1 March. Purpose is to create national macroprudential authority tasked with identifying, preventing and mitigating development of systemic risk and ensuring financial system makes sustainable contribution to economic growth.

Structure:

• Council: Ministry of Economy (president), Banco de España, CNMV, DGSFP
• Financial Stability Technical Committee (CTEF): high-ranking officials

Powers: Royal Decree 102/2019 sets organisation and functioning, entrusts it with tasks of identification, monitoring and regular analysis of systemic risk factors. Can issue and publish warnings and recommendations and opinions on proposed macroprudential policy measures by sectoral authorities.

C. FROB - Resolution Safeguard

Created in context of financial crisis by Royal Decree-Law 9/2009 sobre reestructuración bancaria y reforzamiento de recursos propios.

Evolution:

• FROB I: Preference shares
• FROB II (2011): Ordinary capital, control
• Law 9/2012 + Law 11/2015 (BRRD transposition): Became fully-fledged resolution authority separate from banking supervision. Clarified resolution powers and transposed BRRD including bail-in power for both subordinated and senior debt. Powers include early action, preventative powers, power to override shareholders rights, update statutory insolvency creditor hierarchy, enable liquidators to transfer deposit accounts.

Constitutional safeguards built into FROB Law:

• Proportionality: bail-in only after 8% loss absorption
• No creditor worse off than in liquidation
• Judicial review before Audiencia Nacional

3. Emergency Legislative Safeguard: Article 86.1 CE

Almost all safeguards were enacted via Real Decreto-Ley under extraordinary and urgent need doctrine.

TC doctrine on Article 86:

STC 68/2007, STC 137/2011, STC 100/2012:

• Existence of urgent necessity is political judgment of discretionary nature, but reviewable
• Government cannot use decree-law for tackling issues that are structural rather than unexpected
• Connection required between emergency and measure

Applied to banking:

STC 27/2015, STC 18/2015 - RDL 9/2009 FROB challenge:
Dismissed. Held framework was sufficient only for idiosyncratic crises, not impending systemic crisis - new body needed, urgency proven by ECB reports.

STC 48/2015, STC 23/2015 - RDL 2/2012, 18/2012 clean-up:
Upheld forced provisioning of 80bn for real estate exposure. TC: Limitation of property right Art 33 justified by Art 40 financial stability. Court has declared unconstitutionality and nullity of challenged rule only for attached tax provisions, not core solvency measures.

Question of Unconstitutionality RDL 3/2016 - DLA Piper case:
Audiencia Nacional raised question before Constitutional Court of RDL 3/2016 on grounds it violates limits of power to legislate by Royal Decree (Art 86.1) and violates principle of economic capacity (Art 31). RDL imposed permanent corporate tax limits to fund SAREB. Shows limit of emergency power: cannot fund financial stability via permanent tax through RDL.

4. Consumer and Social Safeguard Against Instability Created by Banks

Constitution protects two sides: stability of banks AND stability of citizens against bank misconduct.

Article 51 CE - Consumer Protection + Article 18 CE + STC 292/2000 data protection
Basis for:

• Law 4/2022 protection of vulnerable consumers: Prohibits financial exclusion as cause of instability for households. Protocol 21 Feb 2022 extended cashier hours, human assistance.
• STS 9 May 2013 Floor clauses: Supreme Court declared floor clauses in mortgages abusive.
• CJEU C-154/15 Gutiérrez Naranjo: Court held contrary to Art 6(1) Directive 93/13 case-law of Tribunal Supremo which limited restitutory effects of declaration of invalidity of floor clauses. Spanish courts must give full retroactive effect. Constitutional implication: stability cannot be achieved by harming consumers.
• CJEU C-125/18 and C-600/19 on transparency: Reference to circular 8/1990 del Banco de España sobre transparencia. Obligations for banks to explain official indices.

5. European Constitutional Safeguards Integrated

EU Charter + Spanish Constitution:

• Article 16 EU Charter - Freedom to conduct business vs Article 38 CE - Balance: ECB/EBA can impose buffer, but must be proportionate (STC 66/1995 proportionality test: benefits for general interest must outweigh harm)
• ESRB Recommendation ESRB/2011/3 - transposed via AMCESFI - early warning
• BRRD No Creditor Worse Off - transposed as constitutional guarantee of Art 33 property

Key CJEU cases for Spain:

• C-450/17 Landeskreditbank v ECB: Defines that ECB is ultimate macroprudential authority under SSM, national authority implements. Spanish doctrine uses it to justify constitutional legitimacy of ECB top-up.
• C-526/14 Kotnik: Bail-in of subordinated debt as condition for State aid does not violate property. Cited by Spanish Supreme Court to uphold FROB bail-in of preferentes in Bankia, Catalunya Banc.

6. Summary of Safeguard Pyramid

In Spanish doctrine, financial instability is therefore unconstitutional under Art 135 + 40 if State fails to act, and measures to prevent it are constitutional even if they limit property or regional autonomy, provided they pass proportionality test of STC 66/1995: restriction must be balanced because it derived from benefits for general interest than harm to other goods in conflict.

That is why Spain has not had a successful constitutional challenge to core macroprudential buffers since 2012 - all STCs have dismissed.