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Diversification in Your 401(k)

October 30th, 2026

3 min. read

By Jeff Miles, Strategic Risk Advisor

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Your 401(k) may offer a long list of funds, but owning several funds does not necessarily mean your savings are spread as broadly as you think. Two funds with different names might own many of the same companies. A single fund, on the other hand, may already hold a wide range of investments. Understanding what you own matters more than counting the choices on your statement.

Diversification means spreading investments across different holdings to reduce reliance on any one company, industry or investment category. It can help manage certain risks, but it cannot prevent losses or guarantee a profit. Stocks, bonds and other investments can all decline, and a diversified account can lose value when markets fall.

What diversification can and cannot do

If an account depends heavily on one company and that company struggles, the loss can affect a large portion of the account. Holding investments across more companies and industries reduces that particular concentration. The same idea applies when comparing different markets or investment categories, although the holdings may still react to some of the same economic events.

Diversification does not eliminate market risk. Even a fund that owns hundreds of companies can fall during a broad market decline. The purpose is to avoid relying unnecessarily on one outcome, while recognizing that every investment choice carries risks and costs.

Understand your mix and the holdings inside it

Asset allocation describes how money is divided among broad categories such as stocks, bonds and cash-like investments. Diversification also matters within those categories. A stock fund focused on one industry has a different concentration from a broad stock fund holding companies across many industries. A bond fund can also hold different types of bonds, each with its own risks.

Two levels to review

Asset allocation

How your money is divided among broad categories such as stocks, bonds and cash-like investments.

Diversification

How investments are spread within and across categories.

Investment choices and risks vary. Diversification cannot prevent losses or guarantee a profit.

The mix that fits one person may not fit another. Consider when you expect to need the money, your ability to absorb losses and your comfort with fluctuations. Stocks and bonds play different roles, but neither is risk-free. Read each fund’s objective, holdings and risk information before deciding what role it serves.

Look for overlap before adding another fund

Suppose two funds in a hypothetical account both hold many of the same large U.S. companies. Adding the second fund increases the number of fund names on the statement, but it may not add as much variety as the owner expects. The amount of overlap depends on the actual holdings and the portion invested in each fund.

Two funds can own some of the same companies

Fund A
Company ACompany BCompany C
Fund B
Company BCompany CCompany D

Overlap: Companies B and C appear in both funds.

Hypothetical illustration using fictional holdings. Actual funds may hold many more investments, and their weights can differ. Review each fund’s current holdings; fund names alone do not show the full picture.

Compare the fund fact sheets or prospectuses available through your recordkeeper. Look at the types of investments, regions, sectors and largest holdings. Fund holdings can change, and a partial list will not reveal every overlap. If you are unsure how the funds work together, ask the plan’s education or investment resource for help.

Compare a target-date fund with building your own mix

A target-date fund generally combines investments and adjusts its allocation over time. It may offer a simpler way to hold a diversified mix in one fund, but target-date funds can differ in their holdings, fees and degree of risk even when their target years match. The target year does not guarantee a retirement income or protect the account from loss.

If you choose several funds yourself, you take on more responsibility for the combined mix. Adding another investment to a target-date fund can also change the overall allocation. In either approach, review what the account holds as a whole rather than evaluating each fund name in isolation.

Review and rebalance with a purpose

Over time, different investments may grow or decline at different rates. That can move your account away from the mix you intended. Rebalancing means bringing the allocation back toward a chosen target, but how and when to rebalance depends on the plan, the investments and your circumstances. Review potential fees and any plan restrictions first.

How a mix can drift and be rebalanced

A hypothetical stock and bond allocation can move away from its starting mix.

Starting mix

Stock funds: 60%
Bond funds: 40%

After drift

Stock funds: 70%
Bond funds: 30%

After rebalancing

Stock funds: 60%
Bond funds: 40%

Hypothetical allocation for illustration only, not a recommended investment mix or a forecast. Rebalancing does not guarantee a profit or prevent losses. Plan rules, costs and individual circumstances matter.

Use a periodic review or a meaningful life change as a reason to check your allocation. A market headline alone does not explain whether your investment plan still fits your needs. Start by opening your plan’s investment materials and asking what each fund owns, how the funds overlap and whether the overall risk still fits your timeline. McClone’s Learning Center offers related retirement education as you prepare for that conversation.

Securities offered through LPL Financial, a Registered Broker Dealer, Member FINRA/SIPC. Investment advice offered through Gateway Wealth Partners, LLC, a registered investment advisor. Gateway Wealth Partners, LLC, McClone Retirement Advisors and LPL Financial are separate entities. TAX AND LEGAL DISCLAIMER: McClone and its affiliates do not provide tax, legal or accounting advice. Any material prepared is for informational purposes only, and is not intended to provide, and should not be relied on for, tax, legal or accounting advice. You should consult your own tax, legal and/or accounting advisors before engaging in any transactions.

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Jeff Miles, Strategic Risk Advisor

Jeff Miles is a strategic risk advisor at McClone. He joined the company in December 2014 and is responsible for assisting individuals and businesses in protecting their financial futures. Through education and comprehensive planning, he works with clients to ensure their legacies and businesses continue as intended. Jeff came to McClone with over 20 years of experience in the financial services industry and specializes in life insurance and long-term care. He utilizes a variety of insurance products and strategies in developing and implementing financial risk management plans to protect his clients. Miles received his Bachelor of Business Administration from University of Wisconsin- Madison. Jeff and his wife currently reside in Appleton and are actively involved in the community and their church.