VSAT vs. VIIIX

Last updated Jun 25, 2026

VSAT (Viasat, Inc.) is a stock, while VIIIX (Vanguard Institutional Index Fund Institutional Plus Shares) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, VSAT returned -0.81%/yr vs 15.70%/yr for VIIIX. At a 0.46 correlation, their price movements are largely independent.

Performance

VSAT vs. VIIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Viasat, Inc. (VSAT) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VSAT achieves a 80.59% return, which is significantly higher than VIIIX's 8.21% return. Over the past 10 years, VSAT has underperformed VIIIX with an annualized return of -0.81%, while VIIIX has yielded a comparatively higher 15.70% annualized return.

VSAT

• 1D: -2.58%
• 1M: -16.54%
• YTD: 80.59%
• 6M: 77.04%
• 1Y: 379.43%
• 3Y*: 17.12%
• 5Y*: 3.50%
• 10Y*: -0.81%

VIIIX

• 1D: -1.44%
• 1M: -1.34%
• YTD: 8.21%
• 6M: 6.88%
• 1Y: 22.35%
• 3Y*: 21.22%
• 5Y*: 13.28%
• 10Y*: 15.70%

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

VSAT vs. VIIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VSAT Viasat, Inc.	80.59%	304.94%	-69.55%	-11.69%	-28.94%	36.42%	-55.39%	24.16%	-21.24%	13.03%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	8.21%	17.87%	26.29%	25.79%	-18.14%	28.69%	18.41%	31.48%	-4.41%	21.82%

Correlation

The correlation between VSAT and VIIIX is 0.50, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.50
Correlation (3Y) Calculated over the trailing 3-year period	0.38
Correlation (5Y) Calculated over the trailing 5-year period	0.41
Correlation (10Y) Calculated over the trailing 10-year period	0.44
Correlation (All Time) Calculated using the full available price history since Jul 7, 1997	0.46

The correlation between VSAT and VIIIX shifts across timeframes, from 0.38 (3 years) to 0.50 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

VSAT vs. VIIIX — Risk / Return Rank

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

VSAT

VSAT Risk / Return Rank: 97
VSAT Sharpe Ratio Rank: 98
VSAT Sortino Ratio Rank: 96
VSAT Omega Ratio Rank: 94
VSAT Calmar Ratio Rank: 99
VSAT Martin Ratio Rank: 99

VIIIX

VIIIX Risk / Return Rank: 52
VIIIX Sharpe Ratio Rank: 49
VIIIX Sortino Ratio Rank: 44
VIIIX Omega Ratio Rank: 47
VIIIX Calmar Ratio Rank: 53
VIIIX Martin Ratio Rank: 66

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.

VSAT vs. VIIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Viasat, Inc. (VSAT) 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.

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.

	VSAT	VIIIX	Difference
Sharpe ratio: Return per unit of total volatility	4.56	1.90	+2.67
Sortino ratio: Return per unit of downside risk	4.16	2.59	+1.58
Omega ratio: Gain probability vs. loss probability	1.50	1.34	+0.16
Calmar ratio: Return relative to maximum drawdown	13.16	2.68	+10.48
Martin ratio: Return relative to average drawdown	39.86	12.03	+27.83

VSAT vs. VIIIX - Sharpe Ratio Comparison

The current VSAT Sharpe Ratio is 4.56, which is higher than the VIIIX Sharpe Ratio of 1.90. The chart below compares the historical Sharpe Ratios of VSAT and VIIIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

VSAT vs. VIIIX - Drawdown Comparison

The maximum VSAT drawdown since its inception was -92.75%, which is greater than VIIIX's maximum drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for VSAT and VIIIX.

Drawdown Indicators

	VSAT	VIIIX	Difference
Max Drawdown Largest peak-to-trough decline	-92.75%	-55.18%	-37.57%
Max Drawdown (1Y) Largest decline over 1 year	-29.06%	-8.90%	-20.16%
Max Drawdown (3Y) Largest decline over 3 years	-84.37%	-18.75%	-65.62%
Max Drawdown (5Y) Largest decline over 5 years	-89.81%	-24.50%	-65.31%
Max Drawdown (10Y) Largest decline over 10 years	-92.75%	-33.79%	-58.96%
Current Drawdown Current decline from peak	-33.97%	-3.13%	-30.84%
Average Drawdown Average peak-to-trough decline	-41.51%	-10.00%	-31.51%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.58%	1.98%	+7.60%

Volatility

VSAT vs. VIIIX - Volatility Comparison

Viasat, Inc. (VSAT) has a higher volatility of 28.20% compared to Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) at 4.90%. This indicates that VSAT's price experiences larger fluctuations and is considered to be riskier than VIIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VSAT	VIIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	28.20%	4.90%	+23.30%
Volatility (6M) Calculated over the trailing 6-month period	57.75%	9.93%	+47.82%
Volatility (1Y) Calculated over the trailing 1-year period	83.78%	12.57%	+71.21%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	75.84%	17.00%	+58.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	61.09%	18.08%	+43.01%

Dividends

VSAT vs. VIIIX - Dividend Comparison

VSAT has not paid dividends to shareholders, while VIIIX's dividend yield for the trailing twelve months is around 2.49%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	2.49%	2.11%	3.66%	2.66%	3.39%	4.79%	3.07%	2.86%	2.45%	1.84%	2.38%	2.47%
VSAT Viasat, 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%

Frequently Asked Questions

Can I hold both VSAT and VIIIX in my portfolio?

VSAT and VIIIX have a correlation of 0.50, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VSAT or VIIIX?

VSAT has higher volatility (28.20%) compared to VIIIX (4.90%). In terms of maximum drawdown, VSAT dropped -92.75% vs VIIIX's -55.18%.

Which has better risk-adjusted returns?

VSAT currently has the higher Sharpe Ratio (4.56 vs 1.90), 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.