What if you'd held SLP?
A $1,000 investment in Simulations Plus, Inc. (SLP) at the month-end close of 1997-06 would be worth $17,939 at the close of 2026-08 — +1693.9% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $8,708.
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 1997
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1997 | $1,000 | — |
| 1998 | $191 | -80.9% |
| 1999 | $441 | +131.6% |
| 2000 | $470 | +6.6% |
| 2001 | $200 | -57.4% |
| 2002 | $565 | +181.9% |
| 2003 | $1,058 | +87.4% |
| 2004 | $1,308 | +23.6% |
| 2005 | $1,218 | -6.8% |
| 2006 | $2,729 | +124.0% |
| 2007 | $3,593 | +31.7% |
| 2008 | $865 | -75.9% |
| 2009 | $1,298 | +50.1% |
| 2010 | $2,531 | +95.0% |
| 2011 | $2,813 | +11.2% |
| 2012 | $4,470 | +58.9% |
| 2013 | $5,253 | +17.5% |
| 2014 | $7,182 | +36.7% |
| 2015 | $10,971 | +52.8% |
| 2016 | $10,924 | -0.4% |
| 2017 | $18,516 | +69.5% |
| 2018 | $23,194 | +25.3% |
| 2019 | $34,200 | +47.5% |
| 2020 | $85,034 | +148.6% |
| 2021 | $56,180 | -33.9% |
| 2022 | $43,662 | -22.3% |
| 2023 | $53,745 | +23.1% |
| 2024 | $33,643 | -37.4% |
| 2025 | $21,990 | -34.6% |
| 2026 | $22,159 | +0.8% |
Best and worst month-end to buy
The best single month-end close to have bought SLP was 1998-12 ($0.16): $1,000 then is $116,266 today. The worst was 2021-01 ($77.63): $1,000 then is $237.
FAQ
What would $1,000 in SLP be worth today?
A $1,000 investment in Simulations Plus, Inc. (SLP) at the start of 1997 would be worth about $17,939 today, a total return of +1693.9%. Dividends are reinvested in these figures.
What were the best and worst years for SLP?
Simulations Plus, Inc. (SLP)'s strongest calendar year since 1997 was 2002, a +181.9% return — $1,000 held through that year became about $2,819 by year-end. Its weakest year was 1998, at -80.9%.
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 SLP have grown?
Investing $100 at the end of every month since 1997-06 would have grown to about $543,376 on $35,100 invested.
Did SLP beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $8,708. SLP beat the S&P 500 by +106.0% 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
Simulations Plus, Inc. (SLP) historical total-return data from 1997-06 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.