I Inherited a Stock Portfolio. What Should I Check First?
An inherited portfolio arrives with someone else’s choices, tax history and risks. Here is what to check first, in order, and why there is rarely a reason to rush.
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Most of My Money Is in My Employer’s Stock. Is That Risky?
Employer stock feels familiar and often comes with discounts or matches. It also ties your savings and your paycheck to the same company. Here is how to measure that risk and what to check before changing anything.
Key takeaways
- Yes. It ties your savings and your income to one company. At Enron, 62% of 401(k) plan assets were in Enron stock at the end of 2000, according to the Congressional Research Service.
- Single stocks fall harder than the market. In Exent’s data, the median large US stock fell 61.6% in 2007–09 against 56.5% for the S&P 500, and 338 of 464 fell more than the index in 2022.
- Even strong companies often lag: only 152 of 422 large US stocks beat the S&P 500 over 10 years in Exent’s data.
- Taxes and company rules shape your options, including net unrealized appreciation (NUA), vesting and trading windows. Get professional help before acting.
In this article
Is it risky to have most of my money in my employer’s stock?
Yes, because it is a double bet on one company. If the business runs into trouble, the stock can fall at the same time your job, bonus or unvested equity is at risk. The money meant to carry you through a bad stretch shrinks exactly when you need it.
This is a structural risk, not a judgment on your company. Well-run firms have suffered deep falls too. FINRA’s guide to concentration risk names employer stock in retirement savings as a common source of concentration.
What should I check if I hold a lot of employer stock?
- Total exposure: shares held directly, in the 401(k), from an employee stock purchase plan, vested restricted stock units (RSUs) and options.
- Share of net worth: employer stock as a percent of everything you own, not just one account.
- Unvested equity: future grants that also depend on the same stock price.
- Cost basis for each lot, which decides the tax on any sale.
- Company rules: trading windows, blackout periods and holding requirements.
- 401(k) options: whether employer stock in the plan could qualify for NUA treatment later.
- Overlap: index or sector funds that also hold your employer, adding to the same bet.
How far can a single stock fall?
Much further than the index. Peak-to-trough declines from Exent’s data, as of Sep 30, 2026, for large US stocks:
| Crisis | S&P 500 (SPY) | Median stock | Fell more than SPY | Worst decline |
|---|---|---|---|---|
| Financial crisis, 2007–09 | −56.5% | −61.6% | 220 of 349 | AIG −99.5% |
| Trade-war selloff, 2018 | −20.2% | −22.4% | 258 of 428 | Roku −64.5% |
| COVID crash, 2020 | −34.1% | −40.8% | 301 of 440 | Permian Resources −90.1% |
| Inflation bear market, 2022 | −25.4% | −32.7% | 338 of 464 | Carvana −92.4% |
- Financial crisis, 2007–09
- S&P 500 (SPY)
- −56.5%
- Median stock
- −61.6%
- Fell more than SPY
- 220 of 349
- Worst decline
- AIG −99.5%
- Trade-war selloff, 2018
- S&P 500 (SPY)
- −20.2%
- Median stock
- −22.4%
- Fell more than SPY
- 258 of 428
- Worst decline
- Roku −64.5%
- COVID crash, 2020
- S&P 500 (SPY)
- −34.1%
- Median stock
- −40.8%
- Fell more than SPY
- 301 of 440
- Worst decline
- Permian Resources −90.1%
- Inflation bear market, 2022
- S&P 500 (SPY)
- −25.4%
- Median stock
- −32.7%
- Fell more than SPY
- 338 of 464
- Worst decline
- Carvana −92.4%
Strong companies were not spared: NVIDIA fell 56.0% in the 2018 selloff in the same data. Illustrative: on a $400,000 portfolio with 60% in employer stock, a 61.6% fall in that stock alone costs about $148,000. A 90% fall costs $216,000.
What happened to employees at Enron?
Enron is the best-known case. According to a Congressional Research Service report from March 2002, 62% of the assets in Enron’s 401(k) plan were Enron shares as of December 31, 2000. When the company went bankrupt, many employees lost their jobs and much of their retirement savings in the same event. The lesson is not that every employer is an Enron. It is that one company’s problems should not be able to wipe out both your income and your savings.
What tax and company rules matter?
Several, and they differ by account. For employer stock distributed from a 401(k) in a lump sum, the IRS’s Topic 412 on lump-sum distributions explains that net unrealized appreciation is generally not taxed until you sell the shares. Selling shares inside the 401(k) and moving into the plan’s other funds generally does not trigger tax, while selling shares held in a taxable account can. Restricted stock, purchase plans and options each have their own rules. Company trading windows may limit when you can sell.
Because these choices can have large tax effects, talk to a tax professional or a fee-only planner before acting. For the general approaches investors use, see how to hedge a concentrated position.
Common mistakes with employer stock
- Counting only the 401(k) and forgetting RSUs, purchase-plan shares and options.
- Holding on because you know the company well. Insider familiarity does not reduce market risk.
- Letting a tax bill decide everything. Avoiding tax is worth less than avoiding a large loss.
- Selling in a rush without checking cost basis, NUA eligibility and trading windows.
How do I get a second look at my concentration?
Put every account in one view and measure the employer stock’s share of the total. Count shares in the 401(k), the ESPP, vested RSUs and options, and any company stock held in funds. Then ask what the total would have lost in a past crash, and whether the rest of the portfolio leans on the same industry. A tax adviser can help with NUA and timing. Our guide on how much to hold in one stock explains common limits, and concentration risk covers the basics.
How to measure your employer‑stock exposure with Exent
- Upload screenshots or files of every account (401(k), brokerage, ESPP statement); no brokerage login.
- Exent shows the employer stock’s share of the total and the correlation clusters it forms with the rest of your holdings.
- It replays the portfolio through 2008, 2018, 2020, 2022 and 2025, and the what‑if simulator shows how a smaller position would have changed those losses.
Frequently asked questions
There is no single rule, but many investors cap any one stock at a small share of their total wealth. The more your income also depends on the company, the more a large stake doubles your risk.
According to the Congressional Research Service, 62% of Enron’s 401(k) plan assets were in Enron stock at the end of 2000. When the company went bankrupt, many employees lost their jobs and much of their retirement savings together.
It is the gain on employer stock inside a retirement plan. Under IRS rules for lump-sum distributions, NUA on employer securities is generally not taxed until you sell them. A tax professional can tell you whether it applies to you.
Generally not, because trades inside the plan are not taxed until you withdraw. Selling shares held in a taxable account can create capital gains tax.
Much further than the market. In Exent’s data, Citigroup fell 97.9% in 2007–09 while the S&P 500 fell 56.5%, and in 2022, 338 of 464 large US stocks fell more than the index.
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Educational content, not investment advice. Examples are illustrative; past performance does not guarantee future results.