What if you'd held LII?
A $1,000 investment in Lennox International, Inc. (LII) at the month-end close of 1999-07 would be worth $34,514 at the close of 2026-08 — +3351.4% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $5,801.
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 1999
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1999 | $1,000 | — |
| 2000 | $876 | -12.4% |
| 2001 | $1,139 | +30.0% |
| 2002 | $1,514 | +32.9% |
| 2003 | $2,064 | +36.4% |
| 2004 | $2,573 | +24.6% |
| 2005 | $3,629 | +41.0% |
| 2006 | $4,003 | +10.3% |
| 2007 | $5,497 | +37.3% |
| 2008 | $4,356 | -20.8% |
| 2009 | $5,359 | +23.0% |
| 2010 | $6,580 | +22.8% |
| 2011 | $4,786 | -27.3% |
| 2012 | $7,575 | +58.3% |
| 2013 | $12,429 | +64.1% |
| 2014 | $14,073 | +13.2% |
| 2015 | $18,712 | +33.0% |
| 2016 | $23,208 | +24.0% |
| 2017 | $31,895 | +37.4% |
| 2018 | $33,915 | +6.3% |
| 2019 | $38,247 | +12.8% |
| 2020 | $43,524 | +13.8% |
| 2021 | $52,100 | +19.7% |
| 2022 | $39,103 | -24.9% |
| 2023 | $74,120 | +89.5% |
| 2024 | $101,742 | +37.3% |
| 2025 | $81,864 | -19.5% |
| 2026 | $71,075 | -13.2% |
Best and worst month-end to buy
The best single month-end close to have bought LII was 2000-11 ($4.61): $1,000 then is $90,963 today. The worst was 2024-11 ($656): $1,000 then is $639.
FAQ
What would $1,000 in LII be worth today?
A $1,000 investment in Lennox International, Inc. (LII) at the start of 1999 would be worth about $34,514 today, a total return of +3351.4%. Dividends are reinvested in these figures.
What were the best and worst years for LII?
Lennox International, Inc. (LII)'s strongest calendar year since 1999 was 2023, a +89.5% return — $1,000 held through that year became about $1,895 by year-end. Its weakest year was 2011, at -27.3%.
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 LII have grown?
Investing $100 at the end of every month since 1999-07 would have grown to about $520,599 on $32,600 invested.
Did LII beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $5,801. LII beat the S&P 500 by +495.0% 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
Lennox International, Inc. (LII) historical total-return data from 1999-07 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.