What if you'd held QMCO?
A $1,000 investment in Quantum Corporation (QMCO) at the month-end close of 1999-08 would be worth $7.77 at the close of 2026-09 — -99.2% total return, dividends reinvested. The same $1,000 in the S&P 500, dividends reinvested, would be worth $9,495.
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 2026-09, dividends included.
Every year, $1,000 from 1999
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1999 | $1,000 | — |
| 2000 | $876 | -12.4% |
| 2001 | $651 | -25.7% |
| 2002 | $177 | -72.9% |
| 2003 | $206 | +16.9% |
| 2004 | $173 | -16.0% |
| 2005 | $202 | +16.4% |
| 2006 | $153 | -23.9% |
| 2007 | $178 | +15.9% |
| 2008 | $23.80 | -86.6% |
| 2009 | $194 | +713.9% |
| 2010 | $246 | +27.0% |
| 2011 | $159 | -35.5% |
| 2012 | $81.98 | -48.3% |
| 2013 | $79.34 | -3.2% |
| 2014 | $116 | +46.7% |
| 2015 | $61.49 | -47.2% |
| 2016 | $54.88 | -10.8% |
| 2017 | $46.53 | -15.2% |
| 2018 | $16.53 | -64.5% |
| 2019 | $61.32 | +271.0% |
| 2020 | $50.58 | -17.5% |
| 2021 | $45.62 | -9.8% |
| 2022 | $9.01 | -80.3% |
| 2023 | $2.89 | -67.9% |
| 2024 | $22.28 | +670.3% |
| 2025 | $2.67 | -88.0% |
| 2026 | $9.41 | +253.2% |
Best and worst month-end to buy
The best single month-end close to have bought QMCO was 2024-08 ($3.08): $1,000 then is $7,396 today. The worst was 1999-08 ($2,930): $1,000 then is $7.77.
FAQ
What would $1,000 in QMCO be worth today?
A $1,000 investment in Quantum Corporation (QMCO) at the start of 1999 would be worth about $7.77 today, a total return of -99.2%. Dividends are reinvested in these figures.
What were the best and worst years for QMCO?
Quantum Corporation (QMCO)'s strongest calendar year since 1999 was 2009, a +713.9% return — $1,000 held through that year became about $8,139 by year-end. Its weakest year was 2025, at -88.0%.
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 QMCO have grown?
Investing $100 at the end of every month since 1999-08 would have grown to about $15,382 on $32,600 invested.
Did QMCO beat the S&P 500?
Over the same period, $1,000 in the S&P 500 with dividends reinvested (the S&P 500 Total Return index) would be worth $9,495. QMCO trailed the S&P 500 by +99.9% 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
Quantum Corporation (QMCO) historical total-return data from 1999-08 to 2026-09, reduced to month-end closes for the tables above.
Returns use adjusted close prices — adjusted for stock splits and reinvested dividends, the same convention used by major brokerages. End-of-day and live prices come from EODHD; parts of the deep historical series are carried over from Yahoo Finance data. 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 (EODHD): 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 EODHD and Yahoo Finance. As of 2026-09-02. Not financial advice.