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The traditional retirement playbook is showing its age. Here's how self-directed IRAs are giving investors access to a broader universe of opportunity.
For most investors, retirement planning follows a familiar script: build a portfolio of stocks and bonds, adjust the ratio as you age, and hope the math works out over 30+ years.
It's a strategy that served previous generations reasonably well. But the investment landscape of 2026 looks very different from the one that produced the 60/40 portfolio model, and a growing number of investors are looking beyond public markets to build more resilient, diversified retirement portfolios.
The vehicle making this possible? The self-directed IRA.
The Case for Looking Beyond Public Markets
The argument for diversification is nothing new. What is new is the growing recognition that meaningful diversification may require going beyond the public stock and bond markets entirely.
Consider a few structural shifts:
Fewer public companies to invest in. The number of publicly traded companies in the U.S. has declined significantly from its peak. That means fewer opportunities for investors to participate in high-growth companies through traditional brokerage accounts.
Blurring lines between stocks and bonds. The traditional assumption that stocks and bonds move inversely, providing natural portfolio balance, has been challenged in recent years as correlations have increased during periods of market stress.
Private markets are growing fast. According to Preqin, as cited by Alto, private market assets under management reached approximately $11.87 trillion in 2023 and are projected to grow significantly in the coming years. Institutional investors have been increasing their allocations to private markets for years. Individual investors are now following suit.
The best growth stories start private. Companies are staying private longer, meaning much of the value creation that once occurred after an IPO now happens before it. Investors limited to public markets may be missing the highest-growth phase of many companies.
None of this means public markets are broken. Stocks and bonds remain essential building blocks. But for investors who want true diversification, with exposure to different return drivers, different risk profiles, and different parts of the economic cycle, private markets offer something that public markets alone cannot.
What Is a Self-Directed IRA?
A self-directed IRA (SDIRA) is a retirement account that offers the same tax advantages as a traditional or Roth IRA but allows investment in a much wider range of assets. While a standard IRA through a brokerage typically limits you to stocks, bonds, ETFs, and mutual funds, a self-directed IRA opens the door to:
- Venture capital and private equity: invest in funds or directly in private companies
- Real estate: residential, commercial, raw land, and real estate partnerships
- Private credit: promissory notes, hard money lending, and mortgage notes
- Precious metals: IRS-approved gold, silver, platinum, and palladium
- Cryptocurrency: Bitcoin, Ethereum, and other digital assets
- Natural resources: oil and gas partnerships, mineral rights, timberland
The tax treatment works the same way: traditional SDIRAs offer tax-deferred growth, while Roth SDIRAs offer tax-free growth on qualified distributions. The difference is simply what you're allowed to invest in.
A custodian, such as Alto, a partner of Decile Group, holds the account and ensures compliance with IRS regulations. The investor directs the investment decisions.
Why Private Markets and Retirement Accounts Align
At first glance, alternatives might seem like an unusual fit for retirement savings. But the structural alignment is actually quite strong.
Time horizon alignment. Private market investments typically require multi-year holding periods, anywhere from 3 to 10+ years. Retirement accounts, by design, are held for decades. The illiquidity that makes private investments challenging for short-term investors is much less of a concern when the capital isn't needed for 20 or 30 years.
Tax-advantaged compounding. Private market investments that generate meaningful returns benefit enormously from tax-deferred or tax-free growth. For an asset class where the goal is long-term appreciation, sheltering gains inside an IRA can make a significant difference over decades.
Portfolio resilience. Because many private market assets are less correlated with public equities, they can help reduce overall portfolio volatility. Real estate generates rental income. Private credit provides yield. Venture capital offers exposure to early-stage growth. Each serves a different role in a balanced portfolio.
Generational wealth potential. For investors thinking about wealth that outlasts their own retirement, private market investments inside an IRA can compound for decades and potentially be passed to heirs, with the tax advantages intact.
Private Market Asset Classes Worth Understanding
Here's a closer look at the major private market categories available through self-directed IRAs, as outlined by Alto:
Venture Capital
Venture capital involves investing in early-stage, high-growth companies before they reach public markets. It offers the potential for outsized returns but carries significant risk, as many startups fail and capital is locked up for years.
For retirement investors with appropriate risk tolerance, a small allocation to venture capital can provide growth potential that's difficult to find in public markets. The emergence of smaller, more accessible venture funds, many launched through programs like VC Lab, has made this asset class increasingly available to individual investors.
Real Estate
Real estate is one of the most popular SDIRA asset classes, offering tangible value, potential income through rental yields, and a hedge against inflation. Investors can hold residential properties, commercial buildings, raw land, multifamily units, and real estate partnerships within their self-directed IRA.
Important note: all rental income and gains must flow back into the IRA, and investors cannot personally use properties held in the account.
Private Credit
Private credit, or lending outside the traditional banking system, has been one of the fastest-growing alternative asset classes. It can provide relatively predictable income streams through interest payments, offering a yield component that complements growth-oriented investments.
Precious Metals and Commodities
For investors seeking inflation protection and portfolio ballast, certain precious metals (meeting IRS fineness standards) and commodity-related investments can be held in an SDIRA. These assets tend to behave differently from financial assets, adding another layer of diversification.
What to Know Before Getting Started
Self-directed IRA investing is powerful, but it requires more investor engagement than a standard brokerage account. Here are the key considerations:
Do your own due diligence. SDIRA custodians facilitate investments; they don't evaluate or endorse them. The responsibility for researching and selecting investments falls on you.
Understand the IRS rules. Self-directed IRAs are subject to regulations around prohibited transactions (you can't use IRA assets for personal benefit) and disqualified persons (you can't transact with close family members or entities you control). Violations can result in loss of the IRA's tax-advantaged status.
Plan for illiquidity. Private market investments can't be easily sold. Make sure you have sufficient liquid assets outside the SDIRA to cover near-term needs, including potential required minimum distributions.
Start with a thoughtful allocation. Private markets should complement, not replace, your traditional investments. Consider your risk tolerance, time horizon, and overall financial situation when deciding how much to allocate. Consulting with a financial advisor is recommended.
Work with a reputable custodian. The right custodian simplifies the entire process, from account setup and funding to compliance and ongoing reporting. Alto has processed over 47,000 self-directed IRA investments and supports more than 3,000 private market issuers, making them one of the leading platforms in this space.
The Bottom Line
The retirement investing playbook is evolving. As private markets continue to grow and access continues to broaden, self-directed IRAs offer individual investors a practical, tax-efficient way to participate in asset classes that were once reserved for institutions.
This isn't about chasing risk or abandoning proven strategies. It's about recognizing that the investment universe is much larger than what's available through a standard brokerage account, and that retirement portfolios can benefit from that breadth.
For investors willing to do the homework, embrace longer time horizons, and diversify with intention, private markets through a self-directed IRA can be a meaningful addition to a long-term wealth-building strategy.
Decile Group has partnered with Alto to help emerging fund managers and investors unlock the potential of retirement capital for venture investing.