FCEL vs. PLUG
FCEL (FuelCell Energy, Inc.) and PLUG (Plug Power Inc.) are both stocks. Both operate in the Electrical Equipment & Parts industry within the Industrials sector. Over the past 10 years, FCEL returned -36.01%/yr vs 4.32%/yr for PLUG. At a 0.47 correlation, their price movements are largely independent.
Performance
FCEL vs. PLUG - Performance Comparison
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Returns By Period
In the year-to-date period, FCEL achieves a 194.94% return, which is significantly higher than PLUG's 32.49% return. Over the past 10 years, FCEL has underperformed PLUG with an annualized return of -36.01%, while PLUG has yielded a comparatively higher 4.32% annualized return.
FCEL
- 1D
- -1.19%
- 1M
- -13.79%
- YTD
- 194.94%
- 6M
- 145.84%
- 1Y
- 263.58%
- 3Y*
- -30.92%
- 5Y*
- -39.49%
- 10Y*
- -36.01%
PLUG
- 1D
- -3.69%
- 1M
- -30.95%
- YTD
- 32.49%
- 6M
- 24.29%
- 1Y
- 125.00%
- 3Y*
- -34.29%
- 5Y*
- -39.37%
- 10Y*
- 4.32%
FCEL vs. PLUG - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FCEL FuelCell Energy, Inc. | 194.94% | -19.14% | -81.17% | -42.45% | -46.54% | -53.45% | 345.02% | -62.00% | -67.62% | -2.86% |
PLUG Plug Power Inc. | 32.49% | -7.51% | -52.67% | -63.62% | -56.18% | -16.75% | 973.10% | 154.84% | -47.46% | 96.67% |
Correlation
The correlation between FCEL and PLUG is 0.63, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.63 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.61 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.69 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.58 |
Correlation (All Time) Calculated using the full available price history since Oct 29, 1999 | 0.47 |
The correlation between FCEL and PLUG shifts across timeframes, from 0.47 (all time) to 0.69 (5 years), reflecting how their relationship changes across market environments.
Fundamentals
FCEL:
$1.17B
PLUG:
$3.63B
FCEL:
-$5.47
PLUG:
-$1.39
FCEL:
5.23
PLUG:
4.26
FCEL:
1.63
PLUG:
4.84
FCEL:
$167.88M
PLUG:
$739.76M
FCEL:
-$30.55M
PLUG:
-$189.79M
FCEL:
-$186.85M
PLUG:
-$745.89M
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Return for Risk
FCEL vs. PLUG — Risk / Return Rank
FCEL
PLUG
FCEL vs. PLUG - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for FuelCell Energy, Inc. (FCEL) and Plug Power Inc. (PLUG). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| FCEL | PLUG | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.02 | ||
| Sortino ratioReturn per unit of downside risk | +0.57 | ||
| Omega ratioGain probability vs. loss probability | 1.34 | 1.26 | +0.08 |
| Calmar ratioReturn relative to maximum drawdown | 5.59 | 2.22 | +3.37 |
| Martin ratioReturn relative to average drawdown | 9.72 | 3.71 | +6.01 |
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Drawdowns
FCEL vs. PLUG - Drawdown Comparison
The maximum FCEL drawdown since its inception was -100.00%, roughly equal to the maximum PLUG drawdown of -99.99%. Use the drawdown chart below to compare losses from any high point for FCEL and PLUG.
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Drawdown Indicators
| FCEL | PLUG | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -100.00% | -99.99% | -0.01% |
Max Drawdown (1Y)Largest decline over 1 year | -47.51% | -56.66% | +9.15% |
Max Drawdown (3Y)Largest decline over 3 years | -95.01% | -94.69% | -0.32% |
Max Drawdown (5Y)Largest decline over 5 years | -98.89% | -98.43% | -0.46% |
Max Drawdown (10Y)Largest decline over 10 years | -99.84% | -99.04% | -0.80% |
Current DrawdownCurrent decline from peak | -99.99% | -99.83% | -0.16% |
Average DrawdownAverage peak-to-trough decline | -83.86% | -96.22% | +12.36% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 27.24% | 33.78% | -6.54% |
Volatility
FCEL vs. PLUG - Volatility Comparison
FuelCell Energy, Inc. (FCEL) has a higher volatility of 45.89% compared to Plug Power Inc. (PLUG) at 21.95%. This indicates that FCEL's price experiences larger fluctuations and is considered to be riskier than PLUG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| FCEL | PLUG | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 45.89% | 21.95% | +23.94% |
Volatility (6M)Calculated over the trailing 6-month period | 91.57% | 63.99% | +27.58% |
Volatility (1Y)Calculated over the trailing 1-year period | 120.96% | 106.81% | +14.15% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 98.21% | 94.45% | +3.76% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 123.06% | 89.55% | +33.51% |
Dividends
FCEL vs. PLUG - Dividend Comparison
Neither FCEL nor PLUG has paid dividends to shareholders.
Financials
FCEL vs. PLUG - Financials Comparison
This section allows you to compare key financial metrics between FuelCell Energy, Inc. and Plug Power Inc.. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
Frequently Asked Questions
FCEL and PLUG have a correlation of 0.63, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
FCEL has higher volatility (45.89%) compared to PLUG (21.95%). In terms of maximum drawdown, FCEL dropped -100.00% vs PLUG's -99.99%.
FCEL currently has the higher Sharpe Ratio (2.19 vs 1.18), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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