What if you'd held MPWR?
A $1,000 investment in Monolithic Power Systems, Inc. (MPWR) at the month-end close of 2004-11 would be worth $154,228 at the close of 2026-08 — +15322.8% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $6,567.
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 2004
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2004 | $1,000 | — |
| 2005 | $1,613 | +61.3% |
| 2006 | $1,195 | -25.9% |
| 2007 | $2,310 | +93.2% |
| 2008 | $1,357 | -41.3% |
| 2009 | $2,579 | +90.1% |
| 2010 | $1,777 | -31.1% |
| 2011 | $1,622 | -8.7% |
| 2012 | $2,509 | +54.7% |
| 2013 | $3,904 | +55.6% |
| 2014 | $5,660 | +45.0% |
| 2015 | $7,356 | +30.0% |
| 2016 | $9,567 | +30.1% |
| 2017 | $13,224 | +38.2% |
| 2018 | $13,818 | +4.5% |
| 2019 | $21,391 | +54.8% |
| 2020 | $44,383 | +107.5% |
| 2021 | $60,134 | +35.5% |
| 2022 | $43,429 | -27.8% |
| 2023 | $78,076 | +79.8% |
| 2024 | $73,741 | -5.6% |
| 2025 | $113,893 | +54.4% |
| 2026 | $163,952 | +44.0% |
Best and worst month-end to buy
The best single month-end close to have bought MPWR was 2005-02 ($5.45): $1,000 then is $238,558 today. The worst was 2026-04 ($1,612): $1,000 then is $807.
FAQ
What would $1,000 in MPWR be worth today?
A $1,000 investment in Monolithic Power Systems, Inc. (MPWR) at the start of 2004 would be worth about $154,228 today, a total return of +15322.8%. Dividends are reinvested in these figures.
What were the best and worst years for MPWR?
Monolithic Power Systems, Inc. (MPWR)'s strongest calendar year since 2004 was 2020, a +107.5% return — $1,000 held through that year became about $2,075 by year-end. Its weakest year was 2008, at -41.3%.
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 MPWR have grown?
Investing $100 at the end of every month since 2004-11 would have grown to about $1.25M on $26,200 invested.
Did MPWR beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $6,567. MPWR beat the S&P 500 by +2248.7% in total return.
Is this investment advice?
No. What If I'd Held is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Monolithic Power Systems, Inc. (MPWR) historical total-return data from 2004-11 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. What If I'd Held is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.