CISIX vs. VIIIX

Last updated Apr 1, 2026

Compare and contrast key facts about Calvert US Large-Cap Core Responsible Index Fund (CISIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX).

CISIX is managed by Calvert Research and Management. It was launched on Jun 30, 2000. VIIIX is managed by Vanguard. It was launched on Jul 7, 1997.

Performance

CISIX vs. VIIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calvert US Large-Cap Core Responsible Index Fund (CISIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). The values are adjusted to include any dividend payments, if applicable.

CISIX vs. VIIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CISIX Calvert US Large-Cap Core Responsible Index Fund	-7.68%	15.90%	24.14%	27.27%	-21.68%	25.63%	26.12%	32.81%	-4.08%	21.18%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	-7.06%	17.87%	26.29%	25.79%	-18.14%	28.69%	18.41%	31.48%	-4.41%	21.82%

Returns By Period

In the year-to-date period, CISIX achieves a -7.68% return, which is significantly lower than VIIIX's -7.06% return. Both investments have delivered pretty close results over the past 10 years, with CISIX having a 13.49% annualized return and VIIIX not far ahead at 13.82%.

CISIX

• 1D: -0.44%
• 1M: -8.25%
• YTD: -7.68%
• 6M: -4.74%
• 1Y: 13.68%
• 3Y*: 16.05%
• 5Y*: 9.61%
• 10Y*: 13.49%

VIIIX

• 1D: -0.39%
• 1M: -7.68%
• YTD: -7.06%
• 6M: -4.59%
• 1Y: 14.44%
• 3Y*: 17.57%
• 5Y*: 11.54%
• 10Y*: 13.82%

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

CISIX vs. VIIIX - Expense Ratio Comparison

CISIX has a 0.24% expense ratio, which is higher than VIIIX's 0.02% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

CISIX

Calvert US Large-Cap Core Responsible Index Fund

VIIIX

Vanguard Institutional Index Fund Institutional Plus Shares

Return for Risk

CISIX vs. VIIIX — Risk / Return Rank

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

CISIX

CISIX Risk / Return Rank: 39
CISIX Sharpe Ratio Rank: 36
CISIX Sortino Ratio Rank: 39
CISIX Omega Ratio Rank: 41
CISIX Calmar Ratio Rank: 36
CISIX Martin Ratio Rank: 45

VIIIX

VIIIX Risk / Return Rank: 46
VIIIX Sharpe Ratio Rank: 41
VIIIX Sortino Ratio Rank: 45
VIIIX Omega Ratio Rank: 50
VIIIX Calmar Ratio Rank: 42
VIIIX Martin Ratio Rank: 53

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.

CISIX vs. VIIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calvert US Large-Cap Core Responsible Index Fund (CISIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). 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.

	CISIX	VIIIX	Difference
Sharpe ratio Return per unit of total volatility	0.77	0.84	-0.07
Sortino ratio Return per unit of downside risk	1.22	1.30	-0.08
Omega ratio Gain probability vs. loss probability	1.18	1.20	-0.02
Calmar ratio Return relative to maximum drawdown	0.96	1.06	-0.09
Martin ratio Return relative to average drawdown	4.50	5.14	-0.64
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CISIX vs. VIIIX - Sharpe Ratio Comparison

The current CISIX Sharpe Ratio is 0.77, which is comparable to the VIIIX Sharpe Ratio of 0.84. The chart below compares the historical Sharpe Ratios of CISIX and VIIIX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	CISIX	VIIIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.77	0.84	-0.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.55	0.69	-0.14
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.73	0.77	-0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.35	0.46	-0.11

Correlation

The correlation between CISIX and VIIIX is 0.98, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

CISIX vs. VIIIX - Dividend Comparison

CISIX's dividend yield for the trailing twelve months is around 5.84%, more than VIIIX's 2.90% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CISIX Calvert US Large-Cap Core Responsible Index Fund	5.84%	5.39%	1.77%	1.02%	1.17%	1.02%	0.94%	1.14%	4.33%	2.41%	3.77%	7.62%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	2.90%	2.11%	3.66%	2.66%	3.39%	4.79%	3.07%	2.86%	2.45%	1.84%	2.38%	2.47%

Drawdowns

CISIX vs. VIIIX - Drawdown Comparison

The maximum CISIX drawdown since its inception was -59.36%, which is greater than VIIIX's maximum drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for CISIX and VIIIX.

Drawdown Indicators

	CISIX	VIIIX	Difference
Max Drawdown Largest peak-to-trough decline	-59.36%	-55.18%	-4.18%
Max Drawdown (1Y) Largest decline over 1 year	-12.40%	-12.12%	-0.28%
Max Drawdown (5Y) Largest decline over 5 years	-27.37%	-24.50%	-2.87%
Max Drawdown (10Y) Largest decline over 10 years	-32.82%	-33.79%	+0.97%
Current Drawdown Current decline from peak	-9.72%	-8.90%	-0.82%
Average Drawdown Average peak-to-trough decline	-14.38%	-10.07%	-4.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.66%	2.49%	+0.17%

Volatility

CISIX vs. VIIIX - Volatility Comparison

Calvert US Large-Cap Core Responsible Index Fund (CISIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) have volatilities of 4.43% and 4.24%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CISIX	VIIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.43%	4.24%	+0.19%
Volatility (6M) Calculated over the trailing 6-month period	9.37%	9.08%	+0.29%
Volatility (1Y) Calculated over the trailing 1-year period	18.54%	18.13%	+0.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.72%	16.85%	+0.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.52%	18.02%	+0.50%