What if I had invested in BYD
Every lump sum scenario for BYD, start year by start year, using real prices and each month's exchange rate.
Since December 2003, BYD (a stock listed in Hong Kong and quoted in Hong Kong dollars) grew 40-fold in dollar terms: an annualized return of +17.4% over nearly 23 years. Its record monthly close, HK$131 in March 2025, is still far off: the current price, HK$72.30, is 44.8% below it, split-adjusted. Of the 275 possible purchase months since December 2003, 80% would show a gain today for a lump sum: the entry point mattered.
Data: Yahoo Finance monthly closing prices, up to date as of (latest update November 4, 2026) MethodAuthor: Yann Avondo
If I had invested $1,000 as a lump sum in BYD in January 2016, today I would have $5,024
Over the same period
Worst moment: −50.0% between January 2018 and October 2019. To get this result, you had to hold on without selling.
BYD at a glance
BYD, which started out making phone batteries, became the world’s largest seller of electric and plug-in hybrid cars, ahead of Tesla. Warren Buffett invested as early as 2008. Tracked here through its Hong Kong listing.
Its worst fall, 83.0% in dollar terms between March 2010 and September 2011, was only erased in September 2020, 10 years and 6 months after the peak. Year-to-year swings are extreme: +437.5% in 2009, −58.7% in 2011. Of 22 full calendar years, 13 ended higher. Against the MSCI World, this calculator's yardstick (+7.0% a year in dollar terms over the same period), BYD left it far behind.
$1,000 invested in BYD, by start year
Bought in January, valued at the latest price. Click a year for the full story.
| Start | Worth today | Multiple | Per year |
|---|---|---|---|
| $805 | ×0.81 | −10.7% | |
| $1,007 | ×1.01 | +0.2% | |
| $1,121 | ×1.12 | +3.0% | |
| $809 | ×0.81 | −4.2% | |
| $1,055 | ×1.05 | +0.9% | |
| $5,542 | ×5.54 | +28.1% | |
| $4,334 | ×4.33 | +20.4% | |
| $3,172 | ×3.17 | +13.8% | |
| $5,248 | ×5.25 | +18.2% | |
| $5,024 | ×5.02 | +15.9% | |
| $7,065 | ×7.07 | +17.8% | |
| $5,641 | ×5.64 | +14.3% | |
| $9,217 | ×9.22 | +17.3% | |
| $12,760 | ×13 | +18.6% | |
| $5,267 | ×5.27 | +11.0% | |
| $3,129 | ×3.13 | +7.0% | |
| $16,821 | ×17 | +17.1% | |
| $15,874 | ×16 | +15.7% | |
| $27,406 | ×27 | +18.1% | |
| $68,145 | ×68 | +22.4% | |
| $39,727 | ×40 | +18.3% | |
| $39,819 | ×40 | +17.4% |
Lump sum or DCA in BYD?
Since January 2016, investing in BYD all at once (lump sum) multiplied the stake by ×5.02, +15.9% a year. Investing every month (DCA) multiplied the total contributions by ×2.44, an annual return (IRR) of +15.5%.
Here the lump sum did better: money invested early rode the whole rise. That is the most common outcome on an asset that goes up.
Frequently asked questions
How much would $1,000 invested in BYD 10 years ago be worth today?
$1,000 invested in BYD in January 2016 would be worth about $5,024 today, an average annual return of +15.9% (price only, in the displayed currency).
What if I had invested $1,000 in BYD in 2015?
Invested in January 2015, $1,000 would be worth about $7,065 today, +17.8% a year on average.
What if I had invested $1,000 in BYD in 2020?
Invested in January 2020, $1,000 would be worth about $5,542 today, +28.1% a year on average.
What was the best year to invest in BYD?
Among the start years covered, 2006 gave the best result: $1,000 would have become $68,145. The weakest was 2025, worth $805 today. This ranking is only known with hindsight.
Are dividends included?
By default, the calculation follows the market price only. The "Reinvest dividends" option uses the adjusted price, which includes dividends paid and stock splits: the closest measure of what an investor actually earned.
Are exchange rates taken into account?
Yes. BYD trades in its own currency; every purchase and valuation is converted at that month's exchange rate. A US asset can gain in dollars and less in euros if the dollar weakened.
Are fees and taxes included?
No: results are before brokerage fees, fund fees and taxes. Your net result depends on the account you invest through.
Compare with
Before you have regrets
What this calculation does not tell you.
Hindsight bias
Picking Nvidia or Bitcoin today means picking known winners. Back then, nothing set them apart from hundreds of assets that went nowhere or vanished.
Holding on was the real test
The result assumes you never sold, including through the drawdowns shown above. Very few investors actually do.
The broad market, no bet required
The MSCI World never makes headlines, but it does not require guessing the winner. It is the fairest yardstick for any pick.
Method: past performance, computed from split-adjusted monthly closing prices (intra-month lows are smoothed out). Converted at each month’s exchange rate; no fees, no taxes. The MSCI World benchmark is the price index, excluding dividends. Sources: Yahoo Finance (prices, exchange rates, US Treasury bills), Eurostat (inflation), published regulated rates (Livret A). Not investment advice. NokxiHub.