Energy Recovery, Inc. (ERII)

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Energy Recovery, Inc. (ERII) is down 34.0% since the beginning of the year. At $9 per share, ERII is trading 51.4% below its 52-week high of $18. Investors who bought $1,000 worth of ERII shares 5 years ago would now be looking at an investment worth $423.

Energy Recovery, Inc. (ERII) has returned -34.03% so far this year and -25.96% over the past 12 months. Over the last ten years, ERII has returned 0.86% per year, falling short of the S&P 500 Index benchmark, which averaged 13.88% annually.

Based on dividend-adjusted daily data since Jul 2, 2008, ERII's average daily return is +0.08%, while the average monthly return is +1.50%. At this rate, an investment would double in approximately 3.9 years.

Historically, 51% of months were positive and 49% were negative. The best month was Oct 2015 with a return of +235.1%, while the worst month was May 2010 at -40.6%. The longest winning streak lasted 7 consecutive months, and the longest losing streak was 6 months.

On a daily basis, ERII closed higher 49% of trading days. The best single day was Oct 20, 2015 with a return of +197.6%, while the worst single day was Feb 26, 2026 at -35.3%.

Energy Recovery, Inc. has an annualized alpha of 7.30%, beta of 1.16, and R2 of 0.10 versus S&P 500 Index. Calculated based on daily prices since July 02, 2008.

• This stock participated in 138.24% of S&P 500 Index downside but only 95.21% of its upside - more exposed to losses than it benefited from rallies.
• R2 of 0.10 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.

ERII ranks 24 for risk / return — below 24% of stocks on our site. The returns aren't fully compensating for the risk involved. This isn't necessarily a dealbreaker, but factor it into your decision — especially if you're risk-averse.

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 Energy Recovery, Inc.. 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 Energy Recovery, Inc. was 83.98%, occurring on Apr 12, 2012. Recovery took 1011 trading sessions.

The current Energy Recovery, Inc. drawdown is 70.92%.

The chart below shows the rolling one-month volatility.

The chart below illustrates the trends in the financial health of Energy Recovery, Inc. 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 Energy Recovery, Inc. is priced in the market compared to other companies in the Pollution & Treatment Controls industry. It includes key financial ratios that help investors assess whether the stock is undervalued or overvalued.