What if you'd held IEP?
A $1,000 investment in Icahn Enterprises L.P. (IEP) at the month-end close of 1987-07 would be worth $7,833 at the close of 2026-08 — +683.3% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $24,189.
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 1987
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1987 | $1,000 | — |
| 1988 | $1,173 | +17.3% |
| 1989 | $944 | -19.5% |
| 1990 | $875 | -7.3% |
| 1991 | $1,296 | +48.1% |
| 1992 | $1,194 | -7.8% |
| 1993 | $1,233 | +3.2% |
| 1994 | $1,213 | -1.6% |
| 1995 | $1,374 | +13.3% |
| 1996 | $1,475 | +7.4% |
| 1997 | $1,577 | +6.9% |
| 1998 | $1,626 | +3.1% |
| 1999 | $1,233 | -24.2% |
| 2000 | $1,444 | +17.2% |
| 2001 | $1,460 | +1.1% |
| 2002 | $1,485 | +1.7% |
| 2003 | $2,749 | +85.1% |
| 2004 | $4,624 | +68.2% |
| 2005 | $6,270 | +35.6% |
| 2006 | $14,058 | +124.2% |
| 2007 | $21,377 | +52.1% |
| 2008 | $4,444 | -79.2% |
| 2009 | $6,928 | +55.9% |
| 2010 | $6,277 | -9.4% |
| 2011 | $6,528 | +4.0% |
| 2012 | $8,463 | +29.6% |
| 2013 | $21,809 | +157.7% |
| 2014 | $19,499 | -10.6% |
| 2015 | $13,890 | -28.8% |
| 2016 | $15,110 | +8.8% |
| 2017 | $14,933 | -1.2% |
| 2018 | $17,766 | +19.0% |
| 2019 | $21,397 | +20.4% |
| 2020 | $20,637 | -3.6% |
| 2021 | $23,292 | +12.9% |
| 2022 | $27,661 | +18.8% |
| 2023 | $11,403 | -58.8% |
| 2024 | $7,094 | -37.8% |
| 2025 | $7,678 | +8.2% |
| 2026 | $8,230 | +7.2% |
Best and worst month-end to buy
The best single month-end close to have bought IEP was 1990-12 ($0.71): $1,000 then is $9,406 today. The worst was 2023-02 ($23.75): $1,000 then is $280.
FAQ
What would $1,000 in IEP be worth today?
A $1,000 investment in Icahn Enterprises L.P. (IEP) at the start of 1987 would be worth about $7,833 today, a total return of +683.3%. Dividends are reinvested in these figures.
What were the best and worst years for IEP?
Icahn Enterprises L.P. (IEP)'s strongest calendar year since 1987 was 2013, a +157.7% return — $1,000 held through that year became about $2,577 by year-end. Its weakest year was 2008, at -79.2%.
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 IEP have grown?
Investing $100 at the end of every month since 1987-07 would have grown to about $147,081 on $47,000 invested.
Did IEP beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $24,189. IEP trailed the S&P 500 by +67.6% 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
Icahn Enterprises L.P. (IEP) historical total-return data from 1987-07 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.