REGN’s worst drop since 1999 was 92%
Regeneron Pharmaceuticals (REGN) fell 92% from Feb 2000 to Apr 2005. It took 11.1 years from that peak to close at a new high, in Apr 2011. Over the same years the S&P 500 fell as much as 55%.
That drop ranks 161st deepest among the 986 stocks PortfolioAutopsy tracks.
Drawdown from the last high, 1999 to now
How REGN held up in each crash
| Crash | Years | REGN | S&P 500 |
|---|---|---|---|
| Dot-com bust | 2000–02 | −79.9% | −47.5% |
| Financial crisis | 2007–09 | −51.4% | −55.2% |
| COVID crash | 2020 | −14.0% | −33.7% |
| 2022 rate shock | 2022 | −25.8% | −24.5% |
Each number is the deepest fall from a high inside that window, using daily prices with dividends reinvested.
See how REGN behaves inside your whole mix, with the worst 12 months, loss odds and crash replays. Free, no signup, and the math runs in your browser.
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What was REGN’s maximum drawdown?
REGN’s deepest fall since 1999 was 91.8%, from its high on February 29, 2000 to its low on April 14, 2005. The figure uses daily prices with dividends reinvested.
How long did REGN take to recover?
11.1 years. REGN first closed above its Feb 2000 high again on April 27, 2011.
Was REGN riskier than the S&P 500?
Over the same years, REGN’s worst drop was 91.8% against 55.2% for the S&P 500 (SPY), and its worst 12 months were −74.8% against −47.4%.
Compare with
Daily adjusted closes from Yahoo Finance, January 5, 1999 through October 13, 2026, dividends reinvested. Historical facts, not a forecast and not investment advice.