What if you'd held POWI?
A $1,000 investment in Power Integrations, Inc. (POWI) at the month-end close of 1997-12 would be worth $28,035 at the close of 2026-08 — +2703.5% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $7,943.
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 | $2,704 | +170.4% |
| 1999 | $10,347 | +282.7% |
| 2000 | $2,482 | -76.0% |
| 2001 | $4,930 | +98.6% |
| 2002 | $3,668 | -25.6% |
| 2003 | $7,221 | +96.8% |
| 2004 | $4,266 | -40.9% |
| 2005 | $5,141 | +20.5% |
| 2006 | $5,060 | -1.6% |
| 2007 | $7,432 | +46.9% |
| 2008 | $4,296 | -42.2% |
| 2009 | $7,889 | +83.6% |
| 2010 | $8,764 | +11.1% |
| 2011 | $7,281 | -16.9% |
| 2012 | $7,422 | +1.9% |
| 2013 | $12,407 | +67.2% |
| 2014 | $11,593 | -6.6% |
| 2015 | $11,010 | -5.0% |
| 2016 | $15,508 | +40.8% |
| 2017 | $16,945 | +9.3% |
| 2018 | $14,181 | -16.3% |
| 2019 | $23,206 | +63.6% |
| 2020 | $38,698 | +66.8% |
| 2021 | $44,161 | +14.1% |
| 2022 | $34,407 | -22.1% |
| 2023 | $39,759 | +15.6% |
| 2024 | $30,231 | -24.0% |
| 2025 | $17,734 | -41.3% |
| 2026 | $28,035 | +58.1% |
Best and worst month-end to buy
The best single month-end close to have bought POWI was 1998-07 ($1.88): $1,000 then is $29,676 today. The worst was 2021-08 ($103): $1,000 then is $544.
FAQ
What would $1,000 in POWI be worth today?
A $1,000 investment in Power Integrations, Inc. (POWI) at the start of 1997 would be worth about $28,035 today, a total return of +2703.5%. Dividends are reinvested in these figures.
What were the best and worst years for POWI?
Power Integrations, Inc. (POWI)'s strongest calendar year since 1997 was 1999, a +282.7% return — $1,000 held through that year became about $3,827 by year-end. Its weakest year was 2000, at -76.0%.
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 POWI have grown?
Investing $100 at the end of every month since 1997-12 would have grown to about $142,811 on $34,500 invested.
Did POWI beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $7,943. POWI beat the S&P 500 by +253.0% 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
Power Integrations, Inc. (POWI) historical total-return data from 1997-12 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.