BSPIX vs. VIGAX

Last updated Jun 24, 2026

BSPIX (iShares S&P 500 Index Fund Institutional Class) and VIGAX (Vanguard Growth Index Fund Admiral Shares) are both mutual funds - BSPIX is a S&P 500 fund tracking the S&P 500 Index, while VIGAX is a Large Cap Growth Equities fund tracking the CRSP US Large Cap Growth Index. Both are passively managed. Over the past 10 years, BSPIX returned 15.60%/yr vs 18.26%/yr for VIGAX. Their correlation of 0.94 suggests significant overlap in exposure. BSPIX charges 0.10%/yr vs 0.05%/yr for VIGAX.

Performance

BSPIX vs. VIGAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares S&P 500 Index Fund Institutional Class (BSPIX) and Vanguard Growth Index Fund Admiral Shares (VIGAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BSPIX achieves a 9.73% return, which is significantly higher than VIGAX's 5.74% return. Over the past 10 years, BSPIX has underperformed VIGAX with an annualized return of 15.60%, while VIGAX has yielded a comparatively higher 18.26% annualized return.

BSPIX

• 1D: -0.37%
• 1M: 0.09%
• YTD: 9.73%
• 6M: 8.73%
• 1Y: 25.36%
• 3Y*: 21.26%
• 5Y*: 13.49%
• 10Y*: 15.60%

VIGAX

• 1D: -1.35%
• 1M: -1.90%
• YTD: 5.74%
• 6M: 4.44%
• 1Y: 22.59%
• 3Y*: 23.61%
• 5Y*: 13.38%
• 10Y*: 18.26%

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

BSPIX vs. VIGAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BSPIX iShares S&P 500 Index Fund Institutional Class	9.73%	17.75%	24.85%	26.17%	-18.20%	28.55%	18.35%	31.35%	-4.87%	21.20%
VIGAX Vanguard Growth Index Fund Admiral Shares	5.74%	19.43%	32.67%	46.76%	-33.14%	27.26%	40.18%	37.23%	-3.35%	27.80%

Correlation

The correlation between BSPIX and VIGAX is 0.93, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Jan 2, 2014	0.94

The correlation between BSPIX and VIGAX has been stable across timeframes, ranging from 0.93 to 0.94 - a consistent structural relationship.

Return for Risk

BSPIX vs. VIGAX — Risk / Return Rank

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

BSPIX

BSPIX Risk / Return Rank: 64
BSPIX Sharpe Ratio Rank: 63
BSPIX Sortino Ratio Rank: 56
BSPIX Omega Ratio Rank: 58
BSPIX Calmar Ratio Rank: 66
BSPIX Martin Ratio Rank: 77

VIGAX

VIGAX Risk / Return Rank: 24
VIGAX Sharpe Ratio Rank: 28
VIGAX Sortino Ratio Rank: 26
VIGAX Omega Ratio Rank: 27
VIGAX Calmar Ratio Rank: 18
VIGAX Martin Ratio Rank: 22

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.

BSPIX vs. VIGAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares S&P 500 Index Fund Institutional Class (BSPIX) and Vanguard Growth Index Fund Admiral Shares (VIGAX). 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.

	BSPIX	VIGAX	Difference
Sharpe ratio: Return per unit of total volatility	2.14	1.43	+0.71
Sortino ratio: Return per unit of downside risk	2.89	1.97	+0.93
Omega ratio: Gain probability vs. loss probability	1.39	1.25	+0.14
Calmar ratio: Return relative to maximum drawdown	3.00	1.46	+1.54
Martin ratio: Return relative to average drawdown	13.51	5.01	+8.51

BSPIX vs. VIGAX - Sharpe Ratio Comparison

The current BSPIX Sharpe Ratio is 2.14, which is higher than the VIGAX Sharpe Ratio of 1.43. The chart below compares the historical Sharpe Ratios of BSPIX and VIGAX, 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

BSPIX vs. VIGAX - Drawdown Comparison

The maximum BSPIX drawdown since its inception was -33.75%, smaller than the maximum VIGAX drawdown of -50.66%. Use the drawdown chart below to compare losses from any high point for BSPIX and VIGAX.

Drawdown Indicators

	BSPIX	VIGAX	Difference
Max Drawdown Largest peak-to-trough decline	-33.75%	-50.66%	+16.91%
Max Drawdown (1Y) Largest decline over 1 year	-8.91%	-16.51%	+7.60%
Max Drawdown (3Y) Largest decline over 3 years	-18.74%	-23.04%	+4.30%
Max Drawdown (5Y) Largest decline over 5 years	-24.55%	-35.63%	+11.08%
Max Drawdown (10Y) Largest decline over 10 years	-33.75%	-35.63%	+1.88%
Current Drawdown Current decline from peak	-1.72%	-4.85%	+3.13%
Average Drawdown Average peak-to-trough decline	-3.93%	-11.94%	+8.01%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.97%	4.80%	-2.83%

Volatility

BSPIX vs. VIGAX - Volatility Comparison

The current volatility for iShares S&P 500 Index Fund Institutional Class (BSPIX) is 4.67%, while Vanguard Growth Index Fund Admiral Shares (VIGAX) has a volatility of 6.58%. This indicates that BSPIX experiences smaller price fluctuations and is considered to be less risky than VIGAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BSPIX	VIGAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.67%	6.58%	-1.91%
Volatility (6M) Calculated over the trailing 6-month period	9.83%	13.37%	-3.54%
Volatility (1Y) Calculated over the trailing 1-year period	12.49%	16.89%	-4.40%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.97%	22.49%	-5.52%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.07%	21.67%	-3.60%

BSPIX vs. VIGAX - Expense Ratio Comparison

BSPIX has a 0.10% expense ratio, which is higher than VIGAX's 0.05% 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%.

Dividends

BSPIX vs. VIGAX - Dividend Comparison

BSPIX's dividend yield for the trailing twelve months is around 1.53%, more than VIGAX's 0.38% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BSPIX iShares S&P 500 Index Fund Institutional Class	1.53%	1.66%	1.35%	1.44%	1.94%	1.76%	1.60%	1.92%	1.94%	1.57%	2.30%	2.42%
VIGAX Vanguard Growth Index Fund Admiral Shares	0.38%	0.40%	0.46%	0.57%	0.69%	0.47%	0.66%	0.94%	1.31%	1.14%	1.39%	1.31%

Frequently Asked Questions

Can I hold both BSPIX and VIGAX in my portfolio?

With a correlation of 0.93, BSPIX and VIGAX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, BSPIX or VIGAX?

VIGAX has higher volatility (6.58%) compared to BSPIX (4.67%). In terms of maximum drawdown, BSPIX dropped -33.75% vs VIGAX's -50.66%.

Which has better risk-adjusted returns?

BSPIX currently has the higher Sharpe Ratio (2.14 vs 1.43), 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.