Key Takeaways
- • CalSTRS' $400 billion portfolio faces significant concentration risk, with public and private equities combined representing approximately 79% of total portfolio risk, despite equities comprising a smaller asset weight allocation.
- • Public equities alone account for 63% of total portfolio risk according to BlackRock's Aladdin risk management system, substantially exceeding their 41% asset weight in the fund—indicating pronounced leverage or volatility concentration in public equity holdings.
- • The "Magnificent Seven" technology stocks dominate CalSTRS' top 10 exposures, with Nvidia (1.7%), Apple (1.5%), Alphabet (1.2%), and Microsoft (1.1%) representing outsized concentration within the equity allocation as of March 31, 2026.
- • Domestic U.S. exposure represents 75.4% of the total portfolio, with U.S. government fixed income (10.4%) and U.S. Treasury bonds (56.5% of fixed income exposure) anchoring the fund's largest single-country and asset-class concentrations.
- • CalSTRS maintains strong liquidity positioning and confirms that active risk remains within approved governance ranges, suggesting the fund's risk management framework is operational despite the identified concentration vulnerabilities.
Summary
CalSTRS' recent Board of Trustees portfolio review reveals substantial concentration risk concentrated in equities, even as the $400 billion California State Teachers' Retirement System maintains adequate liquidity and operates within governance parameters. According to the fund's risk assessment materials dated June 11, 2026, public and private equities combined generate approximately 79% of the total portfolio risk. This concentration is particularly pronounced in public equities, which account for 63% of total portfolio risk despite representing only 41% of total asset weight—a structural imbalance that reflects either elevated leverage or higher volatility assumptions embedded in the fund's risk model.
The CalSTRS risk team employs BlackRock's Aladdin risk management platform to quantify total portfolio risk, providing a real-time window into concentration exposures across asset classes and geographies. The analysis reveals pronounced exposure to the "Magnificent Seven" technology cohort, with Nvidia Corp. (1.7%), Apple Inc. (1.5%), Alphabet Inc. (1.2%), and Microsoft Corp. (1.1%) dominating the fund's top 10 holdings. Additional technology exposure includes Amazon.com Inc. (0.8%), Meta Platforms Inc. (0.5%), and Tesla Inc. (0.4%), collectively representing approximately 7.2% of the portfolio's largest documented exposures.
Geographically, CalSTRS exhibits pronounced U.S. concentration, with 75.4% of the portfolio invested domestically as of March 31, 2026. Japan represents the second-largest exposure at 2.3%, followed by the United Kingdom (1.8%), Canada (1.5%), and China (1.1%). Fixed income exposure mirrors this domestic tilt, with U.S. government bonds and treasuries comprising 56.5% of the fund's total fixed income allocation. Major financial institutions including Morgan Stanley and Bank of America Corp. (0.5% each), along with Citigroup Inc. and Goldman Sachs Group Inc. (0.4% each), represent CalSTRS' largest counterparty exposures outside government securities.
Despite the identified concentration risks, CalSTRS reported that active risk remains well within approved governance ranges and emphasized strength in portfolio liquidity and real estate leverage positioning. The fund's One Fund strategic approach and total portfolio framework appear designed to manage these concentrations through diversification across alternatives and real asset classes, though the equity risk footprint remains materially elevated relative to asset weight allocations.
The CalSTRS risk team employs BlackRock's Aladdin risk management platform to quantify total portfolio risk, providing a real-time window into concentration exposures across asset classes and geographies. The analysis reveals pronounced exposure to the "Magnificent Seven" technology cohort, with Nvidia Corp. (1.7%), Apple Inc. (1.5%), Alphabet Inc. (1.2%), and Microsoft Corp. (1.1%) dominating the fund's top 10 holdings. Additional technology exposure includes Amazon.com Inc. (0.8%), Meta Platforms Inc. (0.5%), and Tesla Inc. (0.4%), collectively representing approximately 7.2% of the portfolio's largest documented exposures.
Geographically, CalSTRS exhibits pronounced U.S. concentration, with 75.4% of the portfolio invested domestically as of March 31, 2026. Japan represents the second-largest exposure at 2.3%, followed by the United Kingdom (1.8%), Canada (1.5%), and China (1.1%). Fixed income exposure mirrors this domestic tilt, with U.S. government bonds and treasuries comprising 56.5% of the fund's total fixed income allocation. Major financial institutions including Morgan Stanley and Bank of America Corp. (0.5% each), along with Citigroup Inc. and Goldman Sachs Group Inc. (0.4% each), represent CalSTRS' largest counterparty exposures outside government securities.
Despite the identified concentration risks, CalSTRS reported that active risk remains well within approved governance ranges and emphasized strength in portfolio liquidity and real estate leverage positioning. The fund's One Fund strategic approach and total portfolio framework appear designed to manage these concentrations through diversification across alternatives and real asset classes, though the equity risk footprint remains materially elevated relative to asset weight allocations.
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