PLUG vs. FCEL
PLUG (Plug Power Inc.) and FCEL (FuelCell Energy, Inc.) are both stocks. Both operate in the Electrical Equipment & Parts industry within the Industrials sector. Over the past 10 years, PLUG returned 4.32%/yr vs -36.01%/yr for FCEL. At a 0.47 correlation, their price movements are largely independent.
Performance
PLUG vs. FCEL - Performance Comparison
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Returns By Period
In the year-to-date period, PLUG achieves a 32.49% return, which is significantly lower than FCEL's 194.94% return. Over the past 10 years, PLUG has outperformed FCEL with an annualized return of 4.32%, while FCEL has yielded a comparatively lower -36.01% annualized return.
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
- 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 vs. FCEL - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
PLUG Plug Power Inc. | 32.49% | -7.51% | -52.67% | -63.62% | -56.18% | -16.75% | 973.10% | 154.84% | -47.46% | 96.67% |
FCEL FuelCell Energy, Inc. | 194.94% | -19.14% | -81.17% | -42.45% | -46.54% | -53.45% | 345.02% | -62.00% | -67.62% | -2.86% |
Correlation
The correlation between PLUG and FCEL 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 PLUG and FCEL shifts across timeframes, from 0.47 (all time) to 0.69 (5 years), reflecting how their relationship changes across market environments.
Fundamentals
PLUG:
$3.63B
FCEL:
$1.17B
PLUG:
-$1.39
FCEL:
-$5.47
PLUG:
4.26
FCEL:
5.23
PLUG:
4.84
FCEL:
1.63
PLUG:
$739.76M
FCEL:
$167.88M
PLUG:
-$189.79M
FCEL:
-$30.55M
PLUG:
-$745.89M
FCEL:
-$186.85M
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Return for Risk
PLUG vs. FCEL — Risk / Return Rank
PLUG
FCEL
PLUG vs. FCEL - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Plug Power Inc. (PLUG) and FuelCell Energy, Inc. (FCEL). 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.
| PLUG | FCEL | 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 | 1.26 | 1.34 | -0.08 |
| Calmar ratioReturn relative to maximum drawdown | 2.22 | 5.59 | -3.37 |
| Martin ratioReturn relative to average drawdown | 3.71 | 9.72 | -6.01 |
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Drawdowns
PLUG vs. FCEL - Drawdown Comparison
The maximum PLUG drawdown since its inception was -99.99%, roughly equal to the maximum FCEL drawdown of -100.00%. Use the drawdown chart below to compare losses from any high point for PLUG and FCEL.
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Drawdown Indicators
| PLUG | FCEL | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -99.99% | -100.00% | +0.01% |
Max Drawdown (1Y)Largest decline over 1 year | -56.66% | -47.51% | -9.15% |
Max Drawdown (3Y)Largest decline over 3 years | -94.69% | -95.01% | +0.32% |
Max Drawdown (5Y)Largest decline over 5 years | -98.43% | -98.89% | +0.46% |
Max Drawdown (10Y)Largest decline over 10 years | -99.04% | -99.84% | +0.80% |
Current DrawdownCurrent decline from peak | -99.83% | -99.99% | +0.16% |
Average DrawdownAverage peak-to-trough decline | -96.22% | -83.86% | -12.36% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 33.78% | 27.24% | +6.54% |
Volatility
PLUG vs. FCEL - Volatility Comparison
The current volatility for Plug Power Inc. (PLUG) is 21.95%, while FuelCell Energy, Inc. (FCEL) has a volatility of 45.89%. This indicates that PLUG experiences smaller price fluctuations and is considered to be less risky than FCEL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| PLUG | FCEL | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 21.95% | 45.89% | -23.94% |
Volatility (6M)Calculated over the trailing 6-month period | 63.99% | 91.57% | -27.58% |
Volatility (1Y)Calculated over the trailing 1-year period | 106.81% | 120.96% | -14.15% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 94.45% | 98.21% | -3.76% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 89.55% | 123.06% | -33.51% |
Dividends
PLUG vs. FCEL - Dividend Comparison
Neither PLUG nor FCEL has paid dividends to shareholders.
Financials
PLUG vs. FCEL - Financials Comparison
This section allows you to compare key financial metrics between Plug Power Inc. and FuelCell Energy, 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
PLUG and FCEL 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, PLUG dropped -99.99% vs FCEL's -100.00%.
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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