What if I had invested in Sanofi
Every lump sum scenario for Sanofi, start year by start year, using real prices and each month's exchange rate.
Sanofi, a stock listed in Paris and quoted in euros, went nowhere in dollar terms: +21.7% between December 2003 and November 2026, +0.9% a year. Its monthly close has moved between €40.69 (February 2009) and €104 (January 2025); it now stands at €81.33, split-adjusted. Of 275 possible purchase months since December 2003, only 54% would be in profit today for a lump sum.
Data: Yahoo Finance monthly closing prices, up to date as of (latest update November 3, 2026) MethodAuthor: Yann Avondo
If I had invested $1,000 as a lump sum in Sanofi in January 2016, today I would have $1,065
Over the same period
Worst moment: −28.3% between September 2024 and September 2026. To get this result, you had to hold on without selling.
Sanofi at a glance
Sanofi is France’s largest drugmaker, driven notably by the anti-inflammatory Dupixent and vaccines. The stock long moved sideways, partly offset by a high dividend.
The worst drop from a peak reached 46.8% in dollar terms (June 2006 to February 2009), erased by March 2013. Calendar year after calendar year, 12 of 22 ended higher; the best, 2012, returned +28.4%, the worst, 2008, cost 31.0%. Over the same period, the MSCI World (price index) returned +7.0% a year in dollar terms: Sanofi lagged well behind.
$1,000 invested in Sanofi, by start year
Bought in January, valued at the latest price. Click a year for the full story.
| Start | Worth today | Multiple | Per year |
|---|---|---|---|
| $933 | ×0.93 | −3.6% | |
| $917 | ×0.92 | −2.9% | |
| $944 | ×0.94 | −1.5% | |
| $912 | ×0.91 | −1.9% | |
| $945 | ×0.95 | −0.9% | |
| $911 | ×0.91 | −1.3% | |
| $1,057 | ×1.06 | +0.7% | |
| $1,061 | ×1.06 | +0.7% | |
| $1,131 | ×1.13 | +1.2% | |
| $1,065 | ×1.06 | +0.6% | |
| $994 | ×0.99 | 0.0% | |
| $859 | ×0.86 | −1.2% | |
| $969 | ×0.97 | −0.2% | |
| $1,244 | ×1.24 | +1.5% | |
| $1,438 | ×1.44 | +2.3% | |
| $1,160 | ×1.16 | +0.9% | |
| $1,442 | ×1.44 | +2.1% | |
| $995 | ×1 | 0.0% | |
| $991 | ×0.99 | 0.0% | |
| $1,044 | ×1.04 | +0.2% | |
| $1,147 | ×1.15 | +0.6% | |
| $1,217 | ×1.22 | +0.9% |
Lump sum or DCA in Sanofi?
Since January 2016, investing in Sanofi all at once (lump sum) multiplied the stake by ×1.06, +0.6% a year. Investing every month (DCA) multiplied the total contributions by ×0.98, an annual return (IRR) of −0.4%.
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 Sanofi 10 years ago be worth today?
$1,000 invested in Sanofi in January 2016 would be worth about $1,065 today, an average annual return of +0.6% (price only, in the displayed currency).
What if I had invested $1,000 in Sanofi in 2015?
Invested in January 2015, $1,000 would be worth about $994 today, 0.0% a year on average.
What if I had invested $1,000 in Sanofi in 2020?
Invested in January 2020, $1,000 would be worth about $911 today, −1.3% a year on average.
What was the best year to invest in Sanofi?
Among the start years covered, 2009 gave the best result: $1,000 would have become $1,442. The weakest was 2014, worth $859 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. Sanofi 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.