VPMCX vs. FOKFX

Last updated Jun 4, 2026

VPMCX (Vanguard PRIMECAP Fund Investor Shares) and FOKFX (Fidelity OTC K6 Portfolio) are both Large Cap Growth Equities funds. Over the past 5 years, VPMCX returned 16.44%/yr vs 18.58%/yr for FOKFX. Their correlation of 0.86 suggests significant overlap in exposure. VPMCX charges 0.38%/yr vs 0.50%/yr for FOKFX.

Performance

VPMCX vs. FOKFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard PRIMECAP Fund Investor Shares (VPMCX) and Fidelity OTC K6 Portfolio (FOKFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VPMCX achieves a 25.40% return, which is significantly lower than FOKFX's 28.00% return.

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%

FOKFX

• 1D: 0.90%
• 1M: 11.67%
• YTD: 28.00%
• 6M: 26.89%
• 1Y: 59.16%
• 3Y*: 32.88%
• 5Y*: 18.58%
• 10Y*: —

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

VPMCX vs. FOKFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
VPMCX Vanguard PRIMECAP Fund Investor Shares	25.40%	29.60%	13.23%	28.16%	-15.22%	21.64%	17.16%	15.35%
FOKFX Fidelity OTC K6 Portfolio	28.00%	20.30%	34.58%	43.48%	-32.32%	25.95%	47.52%	17.08%

Correlation

The correlation between VPMCX and FOKFX is 0.77, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.77
Correlation (3Y) Calculated over the trailing 3-year period	0.80
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (All Time) Calculated using the full available price history since Jun 14, 2019	0.86

The correlation between VPMCX and FOKFX has been stable across timeframes, ranging from 0.77 to 0.86 - a consistent structural relationship.

Return for Risk

VPMCX vs. FOKFX — Risk / Return Rank

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

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

FOKFX

FOKFX Risk / Return Rank: 89
FOKFX Sharpe Ratio Rank: 94
FOKFX Sortino Ratio Rank: 86
FOKFX Omega Ratio Rank: 82
FOKFX Calmar Ratio Rank: 91
FOKFX Martin Ratio Rank: 93

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.

VPMCX vs. FOKFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard PRIMECAP Fund Investor Shares (VPMCX) and Fidelity OTC K6 Portfolio (FOKFX). 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.

	VPMCX	FOKFX	Difference
Sharpe ratio: Return per unit of total volatility	3.75	3.27	+0.47
Sortino ratio: Return per unit of downside risk	5.04	4.07	+0.97
Omega ratio: Gain probability vs. loss probability	1.65	1.54	+0.11
Calmar ratio: Return relative to maximum drawdown	5.12	4.82	+0.30
Martin ratio: Return relative to average drawdown	23.59	19.97	+3.62
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VPMCX vs. FOKFX - Sharpe Ratio Comparison

The current VPMCX Sharpe Ratio is 3.75, which is comparable to the FOKFX Sharpe Ratio of 3.27. The chart below compares the historical Sharpe Ratios of VPMCX and FOKFX, 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

	VPMCX	FOKFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.75	3.27	+0.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.91	0.81	+0.09
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.92	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.81	0.96	-0.16

Drawdowns

VPMCX vs. FOKFX - Drawdown Comparison

The maximum VPMCX drawdown since its inception was -50.45%, which is greater than FOKFX's maximum drawdown of -37.26%. Use the drawdown chart below to compare losses from any high point for VPMCX and FOKFX.

Drawdown Indicators

	VPMCX	FOKFX	Difference
Max Drawdown Largest peak-to-trough decline	-50.45%	-37.26%	-13.19%
Max Drawdown (1Y) Largest decline over 1 year	-11.73%	-12.53%	+0.80%
Max Drawdown (3Y) Largest decline over 3 years	-20.56%	-24.81%	+4.25%
Max Drawdown (5Y) Largest decline over 5 years	-25.25%	-37.26%	+12.01%
Max Drawdown (10Y) Largest decline over 10 years	-32.65%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-7.41%	-9.20%	+1.79%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.54%	3.01%	-0.47%

Volatility

VPMCX vs. FOKFX - Volatility Comparison

Vanguard PRIMECAP Fund Investor Shares (VPMCX) has a higher volatility of 6.18% compared to Fidelity OTC K6 Portfolio (FOKFX) at 5.62%. This indicates that VPMCX's price experiences larger fluctuations and is considered to be riskier than FOKFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VPMCX	FOKFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.18%	5.62%	+0.56%
Volatility (6M) Calculated over the trailing 6-month period	12.85%	14.55%	-1.70%
Volatility (1Y) Calculated over the trailing 1-year period	16.02%	18.45%	-2.43%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.26%	23.01%	-4.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.19%	24.63%	-5.44%

VPMCX vs. FOKFX - Expense Ratio Comparison

VPMCX has a 0.38% expense ratio, which is lower than FOKFX's 0.50% expense ratio.

Dividends

VPMCX vs. FOKFX - Dividend Comparison

VPMCX's dividend yield for the trailing twelve months is around 13.04%, more than FOKFX's 3.28% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FOKFX Fidelity OTC K6 Portfolio	3.28%	4.20%	4.58%	0.24%	0.08%	3.81%	0.39%	0.32%	0.00%	0.00%	0.00%	0.00%
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%

Frequently Asked Questions

Can I hold both VPMCX and FOKFX in my portfolio?

VPMCX and FOKFX have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VPMCX or FOKFX?

VPMCX has higher volatility (6.18%) compared to FOKFX (5.62%). In terms of maximum drawdown, VPMCX dropped -50.45% vs FOKFX's -37.26%.

Which has better risk-adjusted returns?

VPMCX currently has the higher Sharpe Ratio (3.75 vs 3.27), 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.