What if you'd held ACFN?
A $1,000 investment in Acorn Energy, Inc. (ACFN) at the month-end close of 1992-02 would be worth $195 at the close of 2026-08 — -80.5% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $18,677.
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 1992
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1992 | $1,000 | — |
| 1993 | $2,270 | +127.0% |
| 1994 | $854 | -62.4% |
| 1995 | $1,258 | +47.4% |
| 1996 | $1,022 | -18.8% |
| 1997 | $764 | -25.3% |
| 1998 | $472 | -38.2% |
| 1999 | $607 | +28.6% |
| 2000 | $753 | +24.1% |
| 2001 | $870 | +15.6% |
| 2002 | $153 | -82.4% |
| 2003 | $617 | +303.7% |
| 2004 | $180 | -70.8% |
| 2005 | $293 | +63.0% |
| 2006 | $624 | +112.9% |
| 2007 | $1,070 | +71.5% |
| 2008 | $250 | -76.6% |
| 2009 | $1,327 | +431.0% |
| 2010 | $698 | -47.4% |
| 2011 | $1,102 | +58.0% |
| 2012 | $1,448 | +31.4% |
| 2013 | $758 | -47.6% |
| 2014 | $143 | -81.1% |
| 2015 | $20.49 | -85.7% |
| 2016 | $33.53 | +63.6% |
| 2017 | $42.85 | +27.8% |
| 2018 | $48.43 | +13.0% |
| 2019 | $68.93 | +42.3% |
| 2020 | $68.93 | 0.0% |
| 2021 | $117 | +70.3% |
| 2022 | $65.20 | -44.4% |
| 2023 | $70.90 | +8.7% |
| 2024 | $208 | +193.8% |
| 2025 | $176 | -15.6% |
| 2026 | $223 | +27.0% |
Best and worst month-end to buy
The best single month-end close to have bought ACFN was 2015-09 ($1.60): $1,000 then is $11,988 today. The worst was 1993-06 ($228): $1,000 then is $84.22.
FAQ
What would $1,000 in ACFN be worth today?
A $1,000 investment in Acorn Energy, Inc. (ACFN) at the start of 1992 would be worth about $195 today, a total return of -80.5%. Dividends are reinvested in these figures.
What were the best and worst years for ACFN?
Acorn Energy, Inc. (ACFN)'s strongest calendar year since 1992 was 2009, a +431.0% return — $1,000 held through that year became about $5,310 by year-end. Its weakest year was 2015, at -85.7%.
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 ACFN have grown?
Investing $100 at the end of every month since 1992-02 would have grown to about $59,477 on $41,500 invested.
Did ACFN beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $18,677. ACFN trailed the S&P 500 by +99.0% 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
Acorn Energy, Inc. (ACFN) historical total-return data from 1992-02 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.