NEPH vs. COR

Last updated Jun 4, 2026

NEPH (Nephros, Inc.) and COR (Cencora Inc.) are both stocks. Both are in the Healthcare sector — NEPH in Medical Instruments & Supplies, COR in Medical Distribution. Over the past 10 years, NEPH returned 2.37%/yr vs 16.54%/yr for COR. At a 0.09 correlation, their price movements are largely independent.

Performance

NEPH vs. COR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nephros, Inc. (NEPH) and Cencora Inc. (COR). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NEPH achieves a -25.41% return, which is significantly lower than COR's -21.63% return. Over the past 10 years, NEPH has underperformed COR with an annualized return of 2.37%, while COR has yielded a comparatively higher 16.54% annualized return.

NEPH

• 1D: -4.21%
• 1M: 18.57%
• YTD: -25.41%
• 6M: -32.59%
• 1Y: 11.31%
• 3Y*: 26.69%
• 5Y*: -16.18%
• 10Y*: 2.37%

COR

• 1D: -0.45%
• 1M: -12.98%
• YTD: -21.63%
• 6M: -21.06%
• 1Y: -8.89%
• 3Y*: 15.73%
• 5Y*: 19.66%
• 10Y*: 16.54%

*Multi-year figures are annualized to reflect compound growth (CAGR)

NEPH vs. COR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NEPH Nephros, Inc.	-25.41%	231.97%	-57.51%	199.00%	-80.39%	-31.24%	-13.77%	93.96%	26.67%	22.92%
COR Cencora Inc.	-21.63%	51.48%	10.37%	25.33%	26.26%	44.09%	23.37%	23.51%	-17.57%	19.51%

Correlation

The correlation between NEPH and COR is 0.01, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.01
Correlation (3Y) Calculated over the trailing 3-year period	0.04
Correlation (5Y) Calculated over the trailing 5-year period	0.06
Correlation (10Y) Calculated over the trailing 10-year period	0.09
Correlation (All Time) Calculated using the full available price history since Jan 5, 2016	0.09

Fundamentals

Market Cap NEPH : $40.01M COR : $51.51B
EPS NEPH : $0.07 COR : $13.07
PE Ratio NEPH : 51.38 COR : 20.17
PEG Ratio NEPH : 0.03 COR : 9.58
PS Ratio NEPH : 2.08 COR : 0.16
PB Ratio NEPH : 3.74 COR : 15.16
Total Revenue (TTM) NEPH : $19.12M COR : $328.68B
Gross Profit (TTM) NEPH : $11.32M COR : $11.66B
EBITDA (TTM) NEPH : $814.00K COR : $3.64B

Return for Risk

NEPH vs. COR — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

NEPH

NEPH Risk / Return Rank: 49
NEPH Sharpe Ratio Rank: 45
NEPH Sortino Ratio Rank: 55
NEPH Omega Ratio Rank: 52
NEPH Calmar Ratio Rank: 46
NEPH Martin Ratio Rank: 46

COR

COR Risk / Return Rank: 27
COR Sharpe Ratio Rank: 28
COR Sortino Ratio Rank: 25
COR Omega Ratio Rank: 25
COR Calmar Ratio Rank: 31
COR Martin Ratio Rank: 25

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

NEPH vs. COR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nephros, Inc. (NEPH) and Cencora Inc. (COR). 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.

	NEPH	COR	Difference
Sharpe ratio Return per unit of total volatility	0.11	-0.30	+0.41
Sortino ratio Return per unit of downside risk	1.05	-0.19	+1.23
Omega ratio Gain probability vs. loss probability	1.12	0.97	+0.15
Calmar ratio Return relative to maximum drawdown	0.22	-0.28	+0.49
Martin ratio Return relative to average drawdown	0.40	-0.82	+1.22
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NEPH vs. COR - Sharpe Ratio Comparison

The current NEPH Sharpe Ratio is 0.11, which is higher than the COR Sharpe Ratio of -0.30. The chart below compares the historical Sharpe Ratios of NEPH and COR, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	NEPH	COR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.11	-0.30	+0.41
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.21	0.89	-1.10
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.03	0.60	-0.58
Sharpe Ratio (All Time) Calculated using the full available price history	0.07	0.54	-0.47

Drawdowns

NEPH vs. COR - Drawdown Comparison

The maximum NEPH drawdown since its inception was -91.98%, which is greater than COR's maximum drawdown of -71.01%. Use the drawdown chart below to compare losses from any high point for NEPH and COR.

Drawdown Indicators

	NEPH	COR	Difference
Max Drawdown Largest peak-to-trough decline	-91.98%	-71.01%	-20.97%
Max Drawdown (1Y) Largest decline over 1 year	-51.94%	-32.44%	-19.50%
Max Drawdown (3Y) Largest decline over 3 years	-65.06%	-32.44%	-32.62%
Max Drawdown (5Y) Largest decline over 5 years	-91.48%	-32.44%	-59.04%
Max Drawdown (10Y) Largest decline over 10 years	-91.98%	-32.44%	-59.54%
Current Drawdown Current decline from peak	-67.93%	-29.37%	-38.56%
Average Drawdown Average peak-to-trough decline	-48.42%	-13.62%	-34.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	28.10%	10.87%	+17.23%

Volatility

NEPH vs. COR - Volatility Comparison

Nephros, Inc. (NEPH) has a higher volatility of 34.04% compared to Cencora Inc. (COR) at 20.43%. This indicates that NEPH's price experiences larger fluctuations and is considered to be riskier than COR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NEPH	COR	Difference
Volatility (1M) Calculated over the trailing 1-month period	34.04%	20.43%	+13.61%
Volatility (6M) Calculated over the trailing 6-month period	59.51%	27.13%	+32.38%
Volatility (1Y) Calculated over the trailing 1-year period	102.82%	30.05%	+72.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	77.17%	22.30%	+54.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	87.34%	27.47%	+59.87%

Dividends

NEPH vs. COR - Dividend Comparison

NEPH has not paid dividends to shareholders, while COR's dividend yield for the trailing twelve months is around 0.89%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COR Cencora Inc.	0.89%	0.67%	0.93%	0.96%	1.13%	5.13%	6.74%	7.48%	2.07%	1.61%	1.77%	1.17%
NEPH Nephros, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

NEPH vs. COR - Profitability Comparison

The chart below illustrates the profitability comparison between Nephros, Inc. and Cencora Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

NEPH - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Nephros, Inc. reported a gross profit of 2.99M and revenue of 5.21M. Therefore, the gross margin over that period was 57.4%.

COR - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Cencora Inc. reported a gross profit of 3.59B and revenue of 78.36B. Therefore, the gross margin over that period was 4.6%.

NEPH - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Nephros, Inc. reported an operating income of 97.00K and revenue of 5.21M, resulting in an operating margin of 1.9%.

COR - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Cencora Inc. reported an operating income of 1.14B and revenue of 78.36B, resulting in an operating margin of 1.5%.

NEPH - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Nephros, Inc. reported a net income of 140.00K and revenue of 5.21M, resulting in a net margin of 2.7%.

COR - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Cencora Inc. reported a net income of 1.64B and revenue of 78.36B, resulting in a net margin of 2.1%.

Frequently Asked Questions

Can I hold both NEPH and COR in my portfolio?

NEPH and COR have a correlation of 0.01, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NEPH or COR?

NEPH has higher volatility (34.04%) compared to COR (20.43%). In terms of maximum drawdown, NEPH dropped -91.98% vs COR's -71.01%.

Which has better risk-adjusted returns?

NEPH currently has the higher Sharpe Ratio (0.11 vs -0.30), 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.