Portfolio diversification is one of the most familiar ideas in investing, and one of the easiest to get wrong without noticing. For busy research professionals, investments are often spread across several accounts opened at different times for different reasons. The result can look diversified on paper while quietly leaning heavily in one direction.
This article covers the basics of portfolio diversification, the less obvious places where concentration can build up, and a short checklist you can use to review your own accounts. Think of it as a field guide rather than a textbook.
What Is Diversification in Investing?
Diversification means spreading investments across different types of assets and holdings so that the performance of any single investment has less influence on the whole portfolio.
The basic idea
Different investments respond differently to economic conditions. When one area struggles, another may hold up better. By owning a mix, you may reduce the impact of any one holding. Diversification does not guarantee a profit or protect against loss, and all investing involves risk.
Layers of diversification
Across asset classes: Stocks, bonds, cash, and other assets tend to behave differently.
Within asset classes: Owning many companies across industries, rather than a handful.
Across company sizes: Large, mid, and small companies may move differently.
Across geographies: Domestic and international markets do not always move together.
Across time: Investing gradually rather than all at once can reduce the impact of timing.
Hidden Concentration: Where Research Professionals Often Overlap
Many people believe they are diversified because they own several funds. But the details matter.
Overlapping funds across accounts
If you have a 403(b) from one university, a 457(b) from another, an IRA, and a brokerage account, each may hold funds that own many of the same companies. Spread across four statements, the overlap is hard to see.
Equity in a startup or spinout
Founders and academic entrepreneurs may hold a meaningful stake in a single private company. That stake can represent a large share of net worth with significant risk and limited liquidity.
Stock options and company stock
Employees of companies, including research partners or industry employers, may build up stock options or company shares over time. Holding a large amount of one company can increase portfolio risk.
Career and investment overlap
Your career is also an asset. Someone whose income depends on one industry, such as biotech, may want to think about how much of their portfolio is tied to that same industry.
How to Diversify a Portfolio: Practical Starting Points
There is no single formula, but these steps can help bring structure to the process.
Look at the whole picture
Start by gathering statements from every account, including old employer plans. Review what you own in total rather than account by account. If you have many accounts, When Is It Time to Consolidate Your Retirement Accounts? may help you decide whether simplifying makes sense.
Connect diversification to your goals
Diversification works hand in hand with asset allocation, which is how your investments are spread across different types of assets. Your timeline, income needs, and comfort with risk all shape what a reasonable mix may look like.
Consider rebalancing
Over time, some investments grow faster than others, and your mix can drift away from your target. Rebalancing means periodically adjusting back toward your intended allocation. Some people rebalance on a schedule, others when the mix moves beyond a set range. Rebalancing may have tax consequences in taxable accounts.
Be thoughtful with concentrated positions
If you hold a large position in one company, options may include gradually reducing it, using it for charitable giving, or holding it while diversifying other assets. The right approach depends on taxes, goals, and the specific situation.
A Quick Diversification Checklist
Use these questions as a starting point when reviewing your accounts:
Do I know everything I own across all accounts?
Does any single company make up a large part of my portfolio?
Do several of my funds hold mostly the same investments?
Is my mix of stocks, bonds, and cash still in line with my plan?
Have I reviewed my portfolio since my last career change?
Do I understand how much risk my portfolio carries?
How Summit Retirement Advisors Approaches Diversification
Summit Retirement Advisors' Asset Management Overview lists asset allocation, risk analysis, 401(k) allocation, diversification, pensions and stock options, and real estate planning among its areas of focus. The firm's site invites visitors to "Know your portfolio risk."
Investment management is coordinated with broader financial planning, which you can read about on the Financial Planning Overview page.
Who Summit Retirement Advisors Serves
Summit Retirement Advisors is located at 310 Ferry Street, Lafayette, IN 47901. The firm works with "research-driven professionals, scientists, professors, founders, and university leaders" who want clarity without sacrificing their time. It describes itself as "problem solvers who thrive on precision and clarity," with an approach that centers on listening first, translating complexity into clarity, collaborative refinement, protecting your time, and long-term planning.
Know Your Portfolio Risk
If you are not sure how diversified your portfolio really is, a review may help. Book an appointment or call 765-447-1330. You can also sign up to receive the firm's newsletter on the contact page.
Frequently Asked Questions
What does portfolio diversification mean?
Portfolio diversification means spreading your investments across different asset classes, companies, industries, and regions so no single investment has too much influence on the overall portfolio.
How many funds do I need to be diversified?
There is no set number. Several funds that hold the same investments may offer less diversification than a smaller number of funds that hold different types of assets.
Does diversification protect against loss?
No. Diversification may help manage risk, but it does not guarantee a profit or protect against loss.
What is concentration risk?
Concentration risk is the risk that comes from having a large share of your money in one company, industry, or asset. If that one investment declines, it can have an outsized effect on your portfolio.
How often should I rebalance my portfolio?
Some people rebalance once a year, while others rebalance when their mix drifts beyond a set range. The right approach depends on your situation and any tax considerations.
Is my 403b diversified enough?
It depends on the funds you selected and how they fit with your other accounts. Reviewing all of your accounts together can give a clearer picture.
Securities offered through Regulus Financial Group, LLC, Member FINRA/SIPC. Advisory services offered through Regal Investment Advisors, LLC, an SEC Registered Investment Advisor. Regal Investment Advisors and Regulus Financial Group are affiliated subsidiaries of Regal Holdings of America, LLC. Insurance products are offered through Summit Financial Group of Indiana. Summit Retirement Advisors and Summit Financial Group of Indiana are affiliated but independent of the Regal entities. This article is for general educational and informational purposes only and is not tax, legal, or investment advice, nor a solicitation to buy or sell any security. Information is from sources believed to be accurate but is not guaranteed. Investing involves risk, including the possible loss of principal. Diversification and asset allocation do not guarantee a profit or protect against loss. Past performance is no guarantee of future results. Please consult with a qualified professional regarding your individual situation.
