A separately managed account (SMA) is a customized portfolio managed by a professional investment manager on behalf of a single institutional investor, offering direct security ownership, tax efficiency, and alignment with specific mandates and ESG criteria.
A separately managed account (SMA) is a portfolio of securities managed by a professional investment firm on behalf of an individual or institutional client, who retains legal ownership of the assets. For institutions—pension funds, endowments, foundations, and sovereign wealth funds—SMAs offer customized mandates, direct holdings, tax efficiency, and alignment with specific governance and fiduciary standard requirements that pooled funds cannot match.
How do separately managed accounts differ from mutual funds and pooled vehicles?
The structural distinction between SMAs and pooled investment vehicles is material to institutional deployment. In a mutual fund or collective investment trust, the asset manager owns the legal title to holdings; investors own fund shares. In an SMA, the institutional client maintains direct beneficial ownership of securities. This difference carries operational, tax, and governance consequences.
For example, when CalPERS (California Public Employees' Retirement System), with $429 billion in assets under management as of June 2024, deploys capital into SMAs, it retains the ability to restrict or exclude specific securities. If a board resolution requires divestment from fossil fuels or weapons manufacturers, the investment manager executes that mandate in real time without regulatory delay. A pooled fund would require alignment across all shareholders, creating friction.
Tax efficiency is another distinction. Institutional investors managing SMAs can harvest losses, time rebalancing around tax events, and coordinate distributions across multiple mandates in ways that pooled structures prevent. Large pension funds with liabilities spanning decades—like the UK's Local Government Pension Scheme (LGPS), which manages roughly £330 billion across 99 local authority funds—rely on this granularity.
Liquidity treatment also differs. In an SMA, the institution controls redemption timing. In a pooled fund, withdrawals are subject to the fund's redemption schedule and potential gating provisions, which became visible during credit market dislocations in 2008 and 2020.
What governance structures do institutional SMAs require?
Institutional separately managed accounts operate under explicit mandates that define investment scope, constraints, and oversight mechanisms. These mandates are contractual and reviewed annually or as policy shifts.
A typical SMA mandate for a defined benefit pension plan will specify:
- Benchmark and performance metrics: The Russell 2000 Index with a permitted tracking error band of ±1.5%, or absolute return targets of 5% above inflation over a rolling 10-year period.
- Exclusion and inclusion lists: Sector caps (e.g., no more than 15% in financials), ESG restrictions, or country-level prohibitions tied to sanctions or divestment commitments.
- Rebalancing rules: Automatic rebalancing when asset class drift exceeds 5%, or calendar-based rebalancing in December and June.
- Reporting and transparency: Monthly factor exposures, holdings-level disclosures, and quarterly governance reporting.
The Employees Retirement System of Texas (ERS), managing $58.5 billion for 844,000 members as of fiscal year 2023, structures its SMA mandates around liability-driven investment (LDI) frameworks. Each SMA manager receives a liability benchmark derived from actuarial modeling, not a traditional equity index. This allows the pension fund to operationalize its funding ratio management within individual accounts.
Fiduciary standards embedded in SMA agreements typically require managers to act in the best interest of the institutional client, avoid conflicts of interest, and disclose fees and performance attribution quarterly. The scope of a fiduciary duty in an SMA is narrower and clearer than in pooled structures, which reduces dispute risk.
Why do large institutions use SMAs for alternative and illiquid strategies?
SMAs for alternatives—private equity, real assets, private credit—function differently from traditional equity and fixed-income mandates but serve the same institutional appetite: customization and operational control.
The Government Pension Fund Global (Norges Bank Investment Management), Norway's sovereign wealth fund with $1.43 trillion under management as of September 2024, maintains separate SMA relationships with private equity managers, real estate firms, and infrastructure partners. Each manager operates under a specific capital call schedule, distribution waterfall, and governance structure defined in partnership agreements.
For illiquid strategies, SMAs solve a scalability problem. A pooled private equity fund raises a finite amount of capital, closes to new investors, and operates on a fixed timeline. An institutional SMA allows the pension fund to maintain continuous capital deployment over years without the friction of successive fund closings. The Canada Pension Plan Investment Board (CPPIB), managing $529.2 billion as of December 2023, structures much of its real asset allocation—including Canadian real estate, renewable energy, and infrastructure—through separately managed relationships with operating partners.
This structure also enables liability matching. A pension fund with $2 billion in liabilities maturing in 2040 can construct an SMA of inflation-linked bonds, infrastructure concessions, and annuity-backed securities timed to those maturities. A pooled fund lacks this precision.
How do SMAs intersect with ESG and stewardship mandates?
Institutional use of SMAs has expanded as sustainability disclosure requirements and stewardship obligations have tightened. The UK Stewardship Code 2020, the EU Sustainable Finance Disclosure Regulation (SFDR), and SEC climate disclosure rules now require institutional asset owners to define and report on engagement, voting, and exclusion policies.
An SMA structure facilitates this transparency. The California State Teachers' Retirement System (CalSTRS), with $376 billion in assets as of June 2024, operates SMAs with explicit stewardship mandates requiring managers to:
- File voting records quarterly, allowing CalSTRS to aggregate and publish voting patterns across all holdings.
- Conduct engagement campaigns on board diversity, executive compensation, and carbon disclosure, with direct reporting lines to CalSTRS's investment office.
- Flag concerning ESG metrics (SASB materiality scores, regulatory violations, supply chain risks) for escalation.
SMAs also enable voting coordination. When proxy advisors issue conflicting recommendations, the institutional investor can override them at the SMA manager level and implement its own voting policy. The Teacher Retirement System of Texas (TRS), managing $217.2 billion for 1.6 million members as of fiscal year 2023, maintains SMAs with dedicated stewardship teams that align voting with the fund's proxy voting guidelines and social responsibility commitments.
What are the cost and operational trade-offs of SMAs?
The institutional appeal of SMAs comes with explicit cost structures. Unlike mutual funds, which typically charge between 0.05% and 0.50% annually, SMAs often charge:
- Asset-based fees: 0.20% to 0.75% of AUM, scaled down at larger positions.
- Performance fees: 10% to 20% of outperformance above a benchmark, subject to high-water marks.
- Service fees: Custody, reporting, and compliance charges of 0.05% to 0.10%.
A $500 million SMA mandate in U.S. large-cap equities with a 0.40% asset fee and 15% performance fee (on 2% outperformance) costs $2 million in base fees plus $1.5 million in performance fees annually. These are material costs that require ROI justification.
Operationally, SMAs demand investment office resources. The institution must:
- Maintain mandate documentation and annual review processes.
- Monitor performance attribution monthly and conduct quarterly rebalancing reviews.
- Coordinate with custodians on cash flow and position verification.
- Manage conflicts of interest when SMA managers also advise other pools (e.g., mutual funds or hedge funds).
Smaller institutions with fewer than $5 billion in assets often find pooled alternatives more efficient. Larger institutions with sophisticated risk management and governance structures leverage SMAs for strategic mandates where customization justifies the overhead.
How do SMAs interact with pecuniary factor analysis and manager selection?
When an institutional investor evaluates an SMA manager, financial viability becomes a selection criterion. A manager's regulatory standing, assets under management, key person risk, and fee sustainability all influence the SMA mandate decision.
A manager with $100 billion in AUM and a 10-year operating history carries lower operational risk than a manager with $2 billion and a 3-year track record. Institutional investors conduct due diligence on manager profitability, staff turnover, technology infrastructure, and cybersecurity maturity. These are pecuniary factors—financial considerations that affect the manager's ability to deliver consistent service.
The SMA agreement typically includes manager replacement clauses. If assets under management for the manager fall below $50 billion globally, or if key investment personnel depart, the institutional investor can terminate the mandate with 30–90 days' notice and redeploy capital to another manager. This contractual protection is stronger in SMAs than in pooled funds, where redemption is limited to fund-level redemption windows.
What role do SMAs play in sovereign wealth fund allocation strategies?
Sovereign wealth funds, which manage national reserves for long-term capital growth or liability funding, deploy SMAs strategically across public and private markets.
The State Oil Fund of Azerbaijan, managing $29.8 billion as of 2023, uses SMAs with global equity managers to implement its diversification mandate while maintaining direct oversight of holdings. Similarly, the Public Investment Fund of Saudi Arabia, with $925 billion in assets, structures portions of its domestic equity allocation through SMAs with local partners, enabling co-investment and governance alignment with national economic priorities.
SMAs allow sovereign wealth funds to implement country-specific or sector-specific strategies without the constraint of pooled fund restrictions. A sovereign fund focused on energy transition can maintain SMAs with renewable energy developers, battery manufacturers, and grid technology firms—each with distinct capital deployment timelines and governance requirements.
Implications for long-term allocators
For institutional investors with $1 billion or more in assets, separately managed accounts represent an important tool for mandate-specific deployment, governance transparency, and stewardship execution. The trade-off between customization and cost tilts toward SMAs for large institutions with clear strategic objectives and dedicated investment operations.
Expect SMA adoption to accelerate among pension funds and endowments as sustainability disclosure rules tighten and liability-driven investment frameworks become standard. The ability to implement custom voting policies, ESG exclusions, and factor tilts within an SMA—while maintaining direct asset ownership—aligns with regulatory expectations for institutional fiduciaries.
Managers competing for SMA mandates will face pressure to lower asset-based fees as institutions consolidate and demand transparency. Bundled reporting, multi-asset SMAs, and performance guarantees will become competitive differentiators. Institutions evaluating SMA strategies should require explicit mandates, quarterly reporting on adherence, and annual governance reviews to justify the operational overhead.