Quidel Corporation (QDEL)

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Quidel Corporation (QDEL) is down 56.7% since the beginning of the year. At $12 per share, QDEL is trading 65.2% below its 52-week high of $36. Investors who bought $1,000 worth of QDEL shares 5 years ago would now be looking at an investment worth $110.

Quidel Corporation (QDEL) has returned -56.69% so far this year and -55.87% over the past 12 months. Over the last ten years, QDEL has returned -3.18% per year, falling short of the S&P 500 Index benchmark, which averaged 13.88% annually.

Based on dividend-adjusted daily data since Mar 3, 1992, QDEL's average daily return is +0.09%, while the average monthly return is +1.45%. At this rate, an investment would double in approximately 4.0 years.

Historically, 51% of months were positive and 49% were negative. The best month was Mar 1992 with a return of +55.9%, while the worst month was Jul 2004 at -41.6%. The longest winning streak lasted 9 consecutive months, and the longest losing streak was 8 months.

On a daily basis, QDEL closed higher 46% of trading days. The best single day was May 8, 2025 with a return of +41.0%, while the worst single day was Oct 3, 2002 at -43.8%.

Quidel Corporation has an annualized alpha of 14.37%, beta of 0.80, and R2 of 0.06 versus S&P 500 Index. Calculated based on daily prices since March 03, 1992.

• This stock participated in 84.94% of S&P 500 Index downside but only 61.91% of its upside - more exposed to losses than it benefited from rallies.
• R2 of 0.06 means this stock moves largely independently of S&P 500 Index - capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.

QDEL ranks 12 for risk / return — in the bottom 12% of stocks on our site. This means you're taking on significantly more risk than the returns justify. Consider whether the potential upside is worth the volatility, or explore alternatives with better risk / return profiles.

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.

The table below displays the maximum drawdowns of the Quidel Corporation. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the Quidel Corporation was 96.70%, occurring on May 11, 2026. The portfolio has not yet recovered.

The current Quidel Corporation drawdown is 95.90%.

The chart below shows the rolling one-month volatility.

The chart below illustrates the trends in the financial health of Quidel Corporation over time, highlighting three key metrics: Total Revenue, Earnings Before Interest and Taxes (EBIT), and Net Income.

The Valuation section provides an overview of how Quidel Corporation is priced in the market compared to other companies in the Diagnostics & Research industry. It includes key financial ratios that help investors assess whether the stock is undervalued or overvalued.