QDEL vs. ENPH
QDEL (Quidel Corporation) and ENPH (Enphase Energy, Inc.) are both stocks. QDEL operates in Diagnostics & Research (Healthcare), while ENPH operates in Solar (Technology). Over the past 10 years, QDEL returned -1.00%/yr vs 36.14%/yr for ENPH. At a 0.23 correlation, their price movements are largely independent.
Performance
QDEL vs. ENPH - Performance Comparison
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Returns By Period
In the year-to-date period, QDEL achieves a -36.03% return, which is significantly lower than ENPH's 39.88% return. Over the past 10 years, QDEL has underperformed ENPH with an annualized return of -1.00%, while ENPH has yielded a comparatively higher 36.14% annualized return.
QDEL
- 1D
- 4.76%
- 1M
- 29.67%
- 6M
- -45.70%
- YTD
- -36.03%
- 1Y
- -39.78%
- 3Y*
- -40.42%
- 5Y*
- -31.71%
- 10Y*
- -1.00%
ENPH
- 1D
- -0.13%
- 1M
- -17.88%
- 6M
- 27.29%
- YTD
- 39.88%
- 1Y
- 7.11%
- 3Y*
- -36.34%
- 5Y*
- -24.59%
- 10Y*
- 36.14%
QDEL vs. ENPH - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
QDEL Quidel Corporation | -36.03% | -35.89% | -39.55% | -13.97% | -36.54% | -24.86% | 139.44% | 53.69% | 12.62% | 102.38% |
ENPH Enphase Energy, Inc. | 39.88% | -53.33% | -48.02% | -50.13% | 44.83% | 4.26% | 571.53% | 452.43% | 96.27% | 138.61% |
Correlation
The correlation between QDEL and ENPH is 0.25, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.25 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.29 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.29 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.24 |
Correlation (All Time) Calculated using the full available price history since Mar 30, 2012 | 0.23 |
Fundamentals
QDEL:
$1.25B
ENPH:
$5.91B
QDEL:
-$17.81
ENPH:
$0.92
QDEL:
0.47
ENPH:
4.25
QDEL:
0.67
ENPH:
5.34
QDEL:
$2.66B
ENPH:
$1.40B
QDEL:
$1.50B
ENPH:
$619.16M
QDEL:
-$662.00M
ENPH:
$189.48M
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Return for Risk
QDEL vs. ENPH — Risk / Return Rank
QDEL
ENPH
QDEL vs. ENPH - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Quidel Corporation (QDEL) and Enphase Energy, Inc. (ENPH). 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.
| QDEL | ENPH | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.55 | ||
| Sortino ratioReturn per unit of downside risk | -1.05 | ||
| Omega ratioGain probability vs. loss probability | 0.96 | 1.09 | -0.13 |
| Calmar ratioReturn relative to maximum drawdown | -0.59 | 0.11 | -0.69 |
| Martin ratioReturn relative to average drawdown | -1.11 | 0.19 | -1.30 |
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Drawdowns
QDEL vs. ENPH - Drawdown Comparison
The maximum QDEL drawdown since its inception was -96.70%, roughly equal to the maximum ENPH drawdown of -95.97%. Use the drawdown chart below to compare losses from any high point for QDEL and ENPH.
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Drawdown Indicators
| QDEL | ENPH | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -96.70% | -95.97% | -0.73% |
Max Drawdown (1Y)Largest decline over 1 year | -71.85% | -40.56% | -31.29% |
Max Drawdown (3Y)Largest decline over 3 years | -88.76% | -86.23% | -2.53% |
Max Drawdown (5Y)Largest decline over 5 years | -94.30% | -92.23% | -2.07% |
Max Drawdown (10Y)Largest decline over 10 years | -96.70% | -92.23% | -4.47% |
Current DrawdownCurrent decline from peak | -93.95% | -86.66% | -7.29% |
Average DrawdownAverage peak-to-trough decline | -40.28% | -50.75% | +10.47% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 38.37% | 23.00% | +15.37% |
Volatility
QDEL vs. ENPH - Volatility Comparison
Quidel Corporation (QDEL) has a higher volatility of 35.15% compared to Enphase Energy, Inc. (ENPH) at 22.51%. This indicates that QDEL's price experiences larger fluctuations and is considered to be riskier than ENPH based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| QDEL | ENPH | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 35.15% | 22.51% | +12.64% |
Volatility (6M)Calculated over the trailing 6-month period | 71.49% | 68.68% | +2.81% |
Volatility (1Y)Calculated over the trailing 1-year period | 85.29% | 83.30% | +1.99% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 61.98% | 70.56% | -8.58% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 58.72% | 78.31% | -19.59% |
Dividends
QDEL vs. ENPH - Dividend Comparison
Neither QDEL nor ENPH has paid dividends to shareholders.
Financials
QDEL vs. ENPH - Financials Comparison
This section allows you to compare key financial metrics between Quidel Corporation and Enphase 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
QDEL vs. ENPH - Profitability Comparison
QDEL - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jul 2026, Quidel Corporation reported a gross profit of 573.00M and revenue of 619.80M. Therefore, the gross margin over that period was 92.5%.
ENPH - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jul 2026, Enphase Energy, Inc. reported a gross profit of 100.39M and revenue of 282.90M. Therefore, the gross margin over that period was 35.5%.
QDEL - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jul 2026, Quidel Corporation reported an operating income of -31.80M and revenue of 619.80M, resulting in an operating margin of -5.1%.
ENPH - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jul 2026, Enphase Energy, Inc. reported an operating income of -29.64M and revenue of 282.90M, resulting in an operating margin of -10.5%.
QDEL - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jul 2026, Quidel Corporation reported a net income of -91.80M and revenue of 619.80M, resulting in a net margin of -14.8%.
ENPH - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jul 2026, Enphase Energy, Inc. reported a net income of -20.31M and revenue of 282.90M, resulting in a net margin of -7.2%.
Frequently Asked Questions
QDEL and ENPH have a correlation of 0.25, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
QDEL has higher volatility (35.15%) compared to ENPH (22.51%). In terms of maximum drawdown, QDEL dropped -96.70% vs ENPH's -95.97%.
ENPH currently has the higher Sharpe Ratio (0.05 vs -0.49), 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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