CLDX vs. SPY

Last updated Jun 6, 2026

CLDX (Celldex Therapeutics, Inc.) is a stock, while SPY (State Street SPDR S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, CLDX returned -8.54%/yr vs 15.16%/yr for SPY. At a 0.38 correlation, their price movements are largely independent.

Performance

CLDX vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Celldex Therapeutics, Inc. (CLDX) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CLDX achieves a 5.38% return, which is significantly lower than SPY's 8.45% return. Over the past 10 years, CLDX has underperformed SPY with an annualized return of -8.54%, while SPY has yielded a comparatively higher 15.16% annualized return.

CLDX

• 1D: -4.38%
• 1M: -16.78%
• YTD: 5.38%
• 6M: -2.82%
• 1Y: 46.54%
• 3Y*: -6.46%
• 5Y*: 0.50%
• 10Y*: -8.54%

SPY

• 1D: -2.58%
• 1M: 0.51%
• YTD: 8.45%
• 6M: 8.18%
• 1Y: 25.79%
• 3Y*: 21.43%
• 5Y*: 13.32%
• 10Y*: 15.16%

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

CLDX vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CLDX Celldex Therapeutics, Inc.	5.38%	7.48%	-36.28%	-11.02%	15.35%	120.55%	685.65%	-24.88%	-93.03%	-19.77%
SPY State Street SPDR S&P 500 ETF	8.45%	17.72%	24.89%	26.18%	-18.18%	28.73%	18.33%	31.22%	-4.57%	21.71%

Correlation

The correlation between CLDX and SPY is 0.36, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.36
Correlation (3Y) Calculated over the trailing 3-year period	0.32
Correlation (5Y) Calculated over the trailing 5-year period	0.38
Correlation (10Y) Calculated over the trailing 10-year period	0.34
Correlation (All Time) Calculated using the full available price history since Mar 11, 2008	0.38

Return for Risk

CLDX vs. SPY — Risk / Return Rank

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

CLDX

CLDX Risk / Return Rank: 70
CLDX Sharpe Ratio Rank: 68
CLDX Sortino Ratio Rank: 68
CLDX Omega Ratio Rank: 64
CLDX Calmar Ratio Rank: 74
CLDX Martin Ratio Rank: 76

SPY

SPY Risk / Return Rank: 66
SPY Sharpe Ratio Rank: 66
SPY Sortino Ratio Rank: 63
SPY Omega Ratio Rank: 66
SPY Calmar Ratio Rank: 60
SPY Martin Ratio Rank: 73

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.

CLDX vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Celldex Therapeutics, Inc. (CLDX) and State Street SPDR S&P 500 ETF (SPY). 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.

	CLDX	SPY	Difference
Sharpe ratio: Return per unit of total volatility	0.81	2.14	-1.33
Sortino ratio: Return per unit of downside risk	1.62	2.88	-1.26
Omega ratio: Gain probability vs. loss probability	1.19	1.39	-0.20
Calmar ratio: Return relative to maximum drawdown	1.93	2.92	-0.99
Martin ratio: Return relative to average drawdown	5.11	13.50	-8.39
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CLDX vs. SPY - Sharpe Ratio Comparison

The current CLDX Sharpe Ratio is 0.81, which is lower than the SPY Sharpe Ratio of 2.14. The chart below compares the historical Sharpe Ratios of CLDX and SPY, 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

	CLDX	SPY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.81	2.14	-1.33
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.01	0.78	-0.77
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.11	0.85	-0.96
Sharpe Ratio (All Time) Calculated using the full available price history	-0.09	0.58	-0.67

Drawdowns

CLDX vs. SPY - Drawdown Comparison

The maximum CLDX drawdown since its inception was -99.73%, which is greater than SPY's maximum drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for CLDX and SPY.

Drawdown Indicators

	CLDX	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-99.73%	-55.19%	-44.54%
Max Drawdown (1Y) Largest decline over 1 year	-24.23%	-8.88%	-15.35%
Max Drawdown (3Y) Largest decline over 3 years	-70.84%	-18.76%	-52.08%
Max Drawdown (5Y) Largest decline over 5 years	-73.11%	-24.50%	-48.61%
Max Drawdown (10Y) Largest decline over 10 years	-97.90%	-33.72%	-64.18%
Current Drawdown Current decline from peak	-94.96%	-2.90%	-92.06%
Average Drawdown Average peak-to-trough decline	-78.02%	-9.05%	-68.97%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.13%	1.91%	+7.22%

Volatility

CLDX vs. SPY - Volatility Comparison

Celldex Therapeutics, Inc. (CLDX) has a higher volatility of 11.75% compared to State Street SPDR S&P 500 ETF (SPY) at 3.73%. This indicates that CLDX's price experiences larger fluctuations and is considered to be riskier than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CLDX	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.75%	3.73%	+8.02%
Volatility (6M) Calculated over the trailing 6-month period	38.58%	9.31%	+29.27%
Volatility (1Y) Calculated over the trailing 1-year period	57.63%	12.12%	+45.51%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	59.21%	17.09%	+42.12%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	77.97%	17.95%	+60.02%

Dividends

CLDX vs. SPY - Dividend Comparison

CLDX has not paid dividends to shareholders, while SPY's dividend yield for the trailing twelve months is around 1.00%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CLDX Celldex Therapeutics, 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%
SPY State Street SPDR S&P 500 ETF	1.00%	1.07%	1.21%	1.40%	1.65%	1.20%	1.52%	1.75%	2.04%	1.80%	2.03%	2.06%

Frequently Asked Questions

Can I hold both CLDX and SPY in my portfolio?

CLDX and SPY have a correlation of 0.36, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CLDX or SPY?

CLDX has higher volatility (11.75%) compared to SPY (3.73%). In terms of maximum drawdown, CLDX dropped -99.73% vs SPY's -55.19%.

Which has better risk-adjusted returns?

SPY currently has the higher Sharpe Ratio (2.14 vs 0.81), 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.