Regime switching strategic asset allocation models are:

Regime switching models are used in finance to account for changes in the behavior of financial variables under different regimes or states. These models help in capturing the effects of abrupt shifts due to various factors, including economic changes, policy shifts, or market conditions.

Step 2: Key Characteristics

Historical Data: While historical data may be used, these models are not typically based solely on it.

Usage by Practitioners: Although useful, they are not the most widely used models among practitioners.

Abrupt Changes: They are specifically designed to model abrupt changes in financial variables, which can result from shifts in regulations, policies, or other macroeconomic changes.

Step 3: Verification with ESG Investing References

Regime switching models are crucial for understanding and modeling the impact of sudden regulatory or policy changes on financial variables: "These models are effective in capturing the shifts in market dynamics caused by changes in regulations and policies, providing a robust framework for strategic asset allocation"​​​​.

Conclusion: Regime switching strategic asset allocation models are used to model abrupt changes in financial variables due to shifts in regulations and policies.

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