Parametric Direct Indexing: Complete Review (2026)

Parametric Portfolio Associates is the oldest and largest direct indexing firm — a Morgan Stanley subsidiary that pioneered the space in 1992 and still manages more direct-indexed assets than any competitor. Parametric is advisor-only: there is no self-serve retail platform. For investors with $500K+ in taxable assets working with a fee-only advisor, Parametric's Custom Core® SMAs offer a level of tax coordination and customization that retail platforms like Schwab Personalized Indexing and Wealthfront cannot match. For everyone else, the advisor-only model and higher all-in cost makes a retail platform the more practical starting point.

What Parametric is

Parametric Portfolio Associates was founded in 1987 by former Russell Investments employees and launched Custom Core® — the first institutionalized direct indexing product — in 1992.¹ Eaton Vance acquired Parametric in 2003; Morgan Stanley then acquired Eaton Vance (and with it, Parametric) in March 2021.

Today, Parametric is the largest direct indexing provider by assets under management, ahead of BlackRock's Aperio and Fidelity's direct indexing platform. Morgan Stanley markets the service under the "Custom to the Core" brand through its advisor network and affiliated channels.

Like Schwab Personalized Indexing and Wealthfront, Parametric's Custom Core works by holding the individual stocks that make up an index — rather than buying an ETF share — in a separately managed account (SMA) where you're the legal owner of each stock. That ownership structure enables:

• Tax-loss harvesting at the single-stock level: When individual positions decline, the advisor can sell the losers to capture the loss, even when the overall index is flat.
• Custom exclusions and overweights: Remove employer stock, fossil fuels, or a specific company; tilt toward quality, value, or momentum factors; mirror a custom benchmark instead of a standard index.
• Concentrated-stock integration: Structure the direct-indexed portfolio specifically to generate losses that offset gains from a concentrated-stock exit — something retail platforms don't support.

What distinguishes Parametric from retail platforms is depth of customization, multi-account coordination, and the advisor-required model that makes both of those possible.

How Custom Core works

The advisor (your fee-only RIA or wealth manager) opens a Custom Core® SMA at one of Parametric's supported custodians — Schwab, Fidelity, Pershing, and others. Parametric's portfolio construction team then:

1. Builds the initial portfolio by holding 200–500 individual stocks that replicate the target benchmark (usually S&P 500, Russell 3000, or a custom benchmark), weighted to minimize tracking error while respecting any exclusions or tilts you've specified.
2. Harvests losses systematically — Parametric monitors positions daily and executes harvesting trades when a stock has fallen enough to generate a harvestable loss while keeping benchmark exposure intact through a substitute position during the 30-day wash-sale window.
3. Coordinates with your advisor on income events (RSU vesting, K-1 distributions, a business sale) so harvesting is timed around your actual tax calendar — not just triggered by daily market movements.
4. Manages transition risk if you're moving an existing taxable portfolio into direct indexing — staging liquidation of low-basis ETF positions over multiple years to avoid a large upfront tax hit.

Customization depth

This is Parametric's core competitive advantage over retail platforms. The table below shows what's available:

Fees and minimums

What Parametric does exceptionally well

1. Cross-account wash-sale protection — for real

Retail platforms (Schwab SPI, Wealthfront) monitor only the accounts enrolled on their platform. Parametric's advisor-coordinated model means your advisor watches the entire picture: your taxable Parametric SMA, your IRA at the same custodian, your spouse's accounts, your 401(k) with similar index funds. When a tax-loss trade is executed in the SMA, the advisor ensures no purchase of the same or substantially identical security occurs within the 30-day window anywhere else in your household. This is the most valuable feature for investors with multiple accounts across custodians — and it's impossible to replicate with a self-serve platform.

2. Concentrated-stock integration

If you hold a large single-stock position — employer equity, inherited shares, a partial exit from a private company — Parametric can construct the direct-indexed portfolio specifically as a loss engine to fund the exit. The portfolio is tilted toward stocks that are negatively correlated with your concentrated position, generating harvested losses precisely when your concentrated stock is rising, which you then use to offset the gain as you sell the position. This is a specific strategy that retail platforms don't support and that requires advisor-level planning to implement correctly.

3. Custom benchmark construction

Rather than tracking a fixed index (S&P 500, Russell 3000), Parametric can build your portfolio against a custom benchmark: exclude a sector entirely, overweight a geographic region, create a factor-tilted benchmark (e.g., "S&P 500 tilted toward quality and low volatility"), or mirror a custom weighting you've designed. This is institutional-grade portfolio construction that retail platforms don't offer — and it means a sophisticated advisor can build a direct-indexed portfolio that reflects your actual investment thesis, not just the market-cap-weighted index.

4. Income-event coordination

RSU vesting, K-1 distributions, a business sale, a consulting windfall — these income events are predictable, and the smart move is to position the direct-indexed portfolio to maximize harvesting in the same year those events create gains or ordinary income. Your advisor knows your compensation calendar, your partnership distributions, and your planned transactions. Parametric's platform gives the advisor the tools to execute that coordination at scale. A daily algorithm at Wealthfront doesn't know you're vesting $300K in RSUs in November.

5. Tax-managed transition planning

Most investors considering direct indexing come in with an existing taxable portfolio — usually ETFs with years of embedded gains. Selling everything at once to move into direct indexing creates a large upfront tax bill that can take years to recover. Parametric's advisors specialize in multi-year transition strategies: in-kind ETF transfers, gradual liquidation timed to income years, charitable giving of high-gain lots, and capital-loss-carryforward deployment. This planning layer is where the advisor fee earns itself most visibly.

Where Parametric falls short

1. No direct retail access

You cannot open a Parametric account on your own. Full stop. If you don't have (and don't want) an ongoing advisor relationship, Parametric is not an option regardless of your asset level. For investors who prefer a self-directed relationship with their investments, Schwab SPI, Wealthfront, or Frec are the practical paths.

2. Higher all-in cost requires larger alpha to break even

At 1.0–1.35% all-in vs. 0.03% for a passive ETF, Parametric needs to generate 1.0–1.3%+ of annual tax alpha just to break even with a Vanguard index fund. At the 23.8% combined LTCG+NIIT rate,³ that requires a harvest rate of roughly 4–5%/year — achievable in volatile markets, but not guaranteed in trending markets with fewer harvest opportunities. At the 15% LTCG rate, the math rarely works even with advisor coordination. The break-even portfolio size is meaningfully higher than for Schwab SPI or Wealthfront.

3. Implementation varies by advisor quality

Because the platform's value depends on advisor coordination, the actual outcome varies significantly by how sophisticated and attentive your advisor is. Parametric provides the tools; the advisor has to use them. A wirehouse advisor managing 200 clients may not coordinate your income events as actively as a boutique RIA focused on tax-managed portfolios. The platform is institutional-grade; advisor execution is not uniform across the industry.

Parametric vs. the alternatives

See the full platform comparison or use the platform selector tool to get a recommendation based on your specific situation.

When Parametric is the right choice

• You have $500K+ in taxable assets and a complex tax picture. Multiple accounts across custodians, RSU or K-1 income, a concentrated position, or planned income events. The advisor-coordination value is real at this level.
• You're already working with a fee-only advisor who manages your broader financial plan. Adding Parametric to an existing advisory relationship costs the platform fee only — the advisor fee is already part of the relationship.
• You have concentrated stock. If you're trying to exit a large single-stock position tax-efficiently over 3–5 years, the concentrated-stock overlay strategy that Parametric enables is difficult to replicate on retail platforms.
• You need a custom benchmark. If your investment policy requires factor tilts, ESG screens beyond what Schwab's three strategies offer, or a benchmark tailored to your overall portfolio — Parametric is built for this.
• You're in the top LTCG bracket (23.8%) and plan to hold the account for 10+ years. The compounding of annual tax-alpha over a long horizon, coordinated with estate-planning strategies like §1014 step-up harvesting, is where the cost premium pays for itself most clearly.

When to look elsewhere

• You don't want an ongoing advisor relationship. Parametric requires one. Schwab SPI, Wealthfront, or Frec are self-serve.
• Your taxable account is under $500K and your tax picture is simple. Schwab SPI at $100K–$500K in the top bracket likely generates better net-of-fee results than adding an advisor layer for Parametric access.
• You're in the 15% LTCG bracket. At 15%, the break-even for any direct indexing platform is already challenging. Adding 1%+ in advisor fees makes the math nearly impossible. See is direct indexing worth it for the full bracket-level analysis.
• You want to evaluate the platform before committing to an advisor. Schwab SPI lets you get started at $100K without a full advisory relationship. You can always upgrade to Parametric later if complexity warrants it.

Frequently asked questions

What is Parametric Portfolio Associates?

Parametric Portfolio Associates is the largest direct indexing provider by AUM — a Morgan Stanley subsidiary (via the 2021 Eaton Vance acquisition) that pioneered direct indexing with its Custom Core® SMA program in 1992. Parametric is advisor-only; clients must work through a financial advisor to access the platform. There is no direct retail option.

What is the minimum for Parametric direct indexing?

The Custom Core® equity program typically requires ~$250,000 minimum, though minimums vary by strategy, advisor relationship, and custodian. Some Parametric fixed-income or multi-asset strategies have lower minimums; institutional accounts have no stated ceiling. Confirm the minimum with the specific advisor you're working with, as it may be negotiable for larger accounts.

How much does Parametric direct indexing cost?

Parametric's platform fee is typically 0.20–0.35%, negotiable based on assets and strategy. On top of that, you pay your advisor's fee — commonly 0.75–1.0% for an independent RIA. All-in cost is typically 1.0–1.35% per year. That's higher than Schwab SPI (0.40% self-serve) or Wealthfront (0.25%), but the advisor coordination that comes with Parametric — cross-account wash-sale protection, income-event timing, concentrated-stock strategy — is designed to generate more tax alpha than the premium costs.

Is Parametric available without an advisor?

No. Parametric is strictly advisor-only. If you want direct indexing without an ongoing advisor relationship, your options are Schwab Personalized Indexing ($100K, 0.40%), Wealthfront ($100K US DI at 0.25% or $5K S&P 500 Direct at 0.09%), or Frec ($20K, 0.09%).

How does Parametric handle wash sales across multiple accounts?

Through advisor coordination. Your advisor monitors all household accounts — taxable SMA, IRA, 401(k), spouse accounts — and ensures no purchase of the same or substantially identical security occurs within 30 days of a tax-loss sale in the Parametric account. This is the most consequential advantage over self-serve platforms, which can only see accounts enrolled on their own platform.

How does Parametric compare to Schwab Personalized Indexing?

Schwab SPI is a retail platform — $100K minimum, 0.40% fee, limited customization (three fixed index strategies), and wash-sale protection only within enrolled SPI accounts. Parametric is advisor-only with ~$250K+ minimum, deeper customization (custom benchmarks, factor tilts, concentrated-stock overlays), and cross-account wash-sale coordination through the advisor. Schwab SPI is the right choice if you want direct indexing at $100K–$500K without an advisor. Parametric is the right choice at $500K+ with a complex tax situation and an existing advisor relationship.

1. Parametric Portfolio Associates history — founded 1987, Custom Core® launched 1992, Morgan Stanley acquisition via Eaton Vance completed March 2021: Parametric company history page; Morgan Stanley direct indexing overview.
2. Parametric Custom Core® fees (0.20–0.35% platform fee, negotiable) and minimum (~$250K+ for standard equity Custom Core): Parametric Custom Core equity SMA page; Parametric Form CRS (Client Relationship Summary).
3. 2026 LTCG tax rates: 20% rate applies to single filers above ~$545,500, MFJ above ~$613,700. NIIT of 3.8% (IRC §1411) applies to MAGI above $200K (single) / $250K (MFJ) — not inflation-indexed. Combined top rate 23.8%. Source: Tax Foundation 2026 tax brackets; Kiplinger 2026 capital gains thresholds.
4. Parametric largest DI provider by AUM; competitor context (Aperio/BlackRock minimums, Schwab SPI, Wealthfront): Morningstar — The Direct Indexing Landscape; BlackRock Aperio tax-managed equity SMAs.

Fees, minimums, and tax thresholds verified as of May 2026. Parametric fees are negotiable; confirm current terms with your advisor before opening an account.