VTWIX vs. VPMCX

Last updated Jun 4, 2026

VTWIX (Vanguard Total World Stock Index Fund Institutional Shares) and VPMCX (Vanguard PRIMECAP Fund Investor Shares) are both Large Cap Growth Equities funds from Vanguard. Over the past 10 years, VTWIX returned 12.83%/yr vs 17.57%/yr for VPMCX. Their correlation of 0.92 suggests significant overlap in exposure. VTWIX charges 0.08%/yr vs 0.38%/yr for VPMCX.

Performance

VTWIX vs. VPMCX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Total World Stock Index Fund Institutional Shares (VTWIX) and Vanguard PRIMECAP Fund Investor Shares (VPMCX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VTWIX achieves a 13.18% return, which is significantly lower than VPMCX's 25.40% return. Over the past 10 years, VTWIX has underperformed VPMCX with an annualized return of 12.83%, while VPMCX has yielded a comparatively higher 17.57% annualized return.

VTWIX

• 1D: 0.37%
• 1M: 5.70%
• YTD: 13.18%
• 6M: 14.11%
• 1Y: 30.33%
• 3Y*: 21.30%
• 5Y*: 11.37%
• 10Y*: 12.83%

VPMCX

• 1D: 0.35%
• 1M: 12.86%
• YTD: 25.40%
• 6M: 26.79%
• 1Y: 58.79%
• 3Y*: 28.00%
• 5Y*: 16.44%
• 10Y*: 17.57%

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

VTWIX vs. VPMCX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VTWIX Vanguard Total World Stock Index Fund Institutional Shares	13.18%	22.43%	16.47%	21.87%	-18.00%	18.21%	16.70%	26.77%	-9.68%	24.21%
VPMCX Vanguard PRIMECAP Fund Investor Shares	25.40%	29.60%	13.23%	28.16%	-15.22%	21.64%	17.16%	27.78%	-1.99%	28.17%

Correlation

The correlation between VTWIX and VPMCX is 0.89, 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	0.89
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Jun 30, 2008	0.92

The correlation between VTWIX and VPMCX has been stable across timeframes, ranging from 0.89 to 0.93 - a consistent structural relationship.

VTWIX vs. VPMCX - Sectors Allocation Comparison

Sectors	VTWIX	VPMCX
Technology	27.8%	28.9%
Financial Services	15.9%	7.6%
Industrials	12.0%	13.2%
Consumer Cyclical	9.5%	11.8%
Communication Services	8.3%	7.7%
Healthcare	8.1%	25.1%
Consumer Defensive	4.8%	1.1%
Energy	4.3%	1.8%
Basic Materials	4.2%	1.6%
Utilities	2.7%	0.0%
Real Estate	2.4%	0.1%

Return for Risk

VTWIX vs. VPMCX — Risk / Return Rank

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

VTWIX

VTWIX Risk / Return Rank: 70
VTWIX Sharpe Ratio Rank: 74
VTWIX Sortino Ratio Rank: 67
VTWIX Omega Ratio Rank: 66
VTWIX Calmar Ratio Rank: 69
VTWIX Martin Ratio Rank: 76

VPMCX

VPMCX Risk / Return Rank: 94
VPMCX Sharpe Ratio Rank: 97
VPMCX Sortino Ratio Rank: 95
VPMCX Omega Ratio Rank: 91
VPMCX Calmar Ratio Rank: 93
VPMCX Martin Ratio Rank: 96

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.

VTWIX vs. VPMCX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total World Stock Index Fund Institutional Shares (VTWIX) and Vanguard PRIMECAP Fund Investor Shares (VPMCX). 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.

	VTWIX	VPMCX	Difference
Sharpe ratio: Return per unit of total volatility	2.49	3.75	-1.26
Sortino ratio: Return per unit of downside risk	3.41	5.04	-1.63
Omega ratio: Gain probability vs. loss probability	1.45	1.65	-0.20
Calmar ratio: Return relative to maximum drawdown	3.19	5.12	-1.93
Martin ratio: Return relative to average drawdown	14.27	23.59	-9.32
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VTWIX vs. VPMCX - Sharpe Ratio Comparison

The current VTWIX Sharpe Ratio is 2.49, which is lower than the VPMCX Sharpe Ratio of 3.75. The chart below compares the historical Sharpe Ratios of VTWIX and VPMCX, 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

	VTWIX	VPMCX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.49	3.75	-1.26
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.73	0.91	-0.18
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.77	0.92	-0.15
Sharpe Ratio (All Time) Calculated using the full available price history	0.46	0.81	-0.34

Drawdowns

VTWIX vs. VPMCX - Drawdown Comparison

The maximum VTWIX drawdown since its inception was -50.16%, roughly equal to the maximum VPMCX drawdown of -50.45%. Use the drawdown chart below to compare losses from any high point for VTWIX and VPMCX.

Drawdown Indicators

	VTWIX	VPMCX	Difference
Max Drawdown Largest peak-to-trough decline	-50.16%	-50.45%	+0.29%
Max Drawdown (1Y) Largest decline over 1 year	-9.64%	-11.73%	+2.09%
Max Drawdown (3Y) Largest decline over 3 years	-16.43%	-20.56%	+4.13%
Max Drawdown (5Y) Largest decline over 5 years	-26.39%	-25.25%	-1.14%
Max Drawdown (10Y) Largest decline over 10 years	-34.20%	-32.65%	-1.55%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-6.97%	-7.41%	+0.44%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.15%	2.54%	-0.39%

Volatility

VTWIX vs. VPMCX - Volatility Comparison

The current volatility for Vanguard Total World Stock Index Fund Institutional Shares (VTWIX) is 3.55%, while Vanguard PRIMECAP Fund Investor Shares (VPMCX) has a volatility of 6.18%. This indicates that VTWIX experiences smaller price fluctuations and is considered to be less risky than VPMCX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VTWIX	VPMCX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.55%	6.18%	-2.63%
Volatility (6M) Calculated over the trailing 6-month period	9.81%	12.85%	-3.04%
Volatility (1Y) Calculated over the trailing 1-year period	12.36%	16.02%	-3.66%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.72%	18.26%	-2.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.76%	19.19%	-2.43%

VTWIX vs. VPMCX - Expense Ratio Comparison

VTWIX has a 0.08% expense ratio, which is lower than VPMCX's 0.38% expense ratio.

Dividends

VTWIX vs. VPMCX - Dividend Comparison

VTWIX's dividend yield for the trailing twelve months is around 1.57%, less than VPMCX's 13.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VPMCX Vanguard PRIMECAP Fund Investor Shares	13.04%	16.36%	6.62%	7.16%	9.85%	10.08%	9.74%	7.15%	8.32%	4.53%	5.05%	5.91%
VTWIX Vanguard Total World Stock Index Fund Institutional Shares	1.57%	1.82%	1.94%	2.07%	2.19%	1.81%	1.66%	2.32%	2.55%	2.11%	2.40%	2.46%

Frequently Asked Questions

Can I hold both VTWIX and VPMCX in my portfolio?

VTWIX and VPMCX have a correlation of 0.89, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VTWIX or VPMCX?

VPMCX has higher volatility (6.18%) compared to VTWIX (3.55%). In terms of maximum drawdown, VTWIX dropped -50.16% vs VPMCX's -50.45%.

Which has better risk-adjusted returns?

VPMCX currently has the higher Sharpe Ratio (3.75 vs 2.49), 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.