What if you'd held STEM?
A $1,000 investment in Stem, Inc. Class A (STEM) at the month-end close of 2020-10 would be worth $29.84 at the close of 2026-08 — -97.0% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $2,357.
Your scenario
Result
If you'd bought $1,000 at the start of each year
Value of $1,000 invested on January 1 of each year, held to 2026-08, dividends included.
Every year, $1,000 from 2020
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2020 | $1,000 | — |
| 2021 | $927 | -7.3% |
| 2022 | $437 | -52.9% |
| 2023 | $190 | -56.6% |
| 2024 | $29.47 | -84.5% |
| 2025 | $36.78 | +24.8% |
| 2026 | $14.08 | -61.7% |
Best and worst month-end to buy
The best single month-end close to have bought STEM was 2026-07 ($5.30): $1,000 then is $1,087 today. The worst was 2021-06 ($720): $1,000 then is $8.00.
FAQ
What would $1,000 in STEM be worth today?
A $1,000 investment in Stem, Inc. Class A (STEM) at the start of 2020 would be worth about $29.84 today, a total return of -97.0%. Dividends are reinvested in these figures.
What were the best and worst years for STEM?
Stem, Inc. Class A (STEM)'s strongest calendar year since 2020 was 2025, a +24.8% return — $1,000 held through that year became about $1,248 by year-end. Its weakest year was 2024, at -84.5%.
Does the calculator include dividends and splits?
Yes where available. Prices are adjusted for both stock splits and reinvested dividends (total return), the same measure brokerages use.
How much would $100 per month in STEM have grown?
Investing $100 at the end of every month since 2020-10 would have grown to about $1,745 on $7,100 invested.
Did STEM beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $2,357. STEM trailed the S&P 500 by +98.7% in total return.
Is this investment advice?
No. Wall Street Regrets is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Stem, Inc. Class A (STEM) historical total-return data from 2020-10 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices from Yahoo Finance historical data — adjusted for stock splits and reinvested dividends — the same convention used by major brokerages. A "year" scenario invests $1,000 at the prior December's month-end close and values it at the latest available month-end close. Non-USD amounts are converted at historical month-end exchange rates (Yahoo Finance): to USD on the buy date and back to your currency at the latest rate, so the return reflects the currency move as well as the asset.
Month-end resolution means intra-month extremes are not captured in tables; the calculator uses exact trading-day closes where daily data is available. Figures ignore taxes, fees, and the currency effects of non-USD listings. History is not a forecast. Wall Street Regrets is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.