FXLCX vs. VIIIX

Last updated Jun 6, 2026

FXLCX (Fidelity Flex Large Cap Focused Index Fund) and VIIIX (Vanguard Institutional Index Fund Institutional Plus Shares) are both mutual funds - FXLCX is a Large Cap Blend Equities fund tracking the Fidelity U.S. Large Cap Focused Index, while VIIIX is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. With a 0.99 correlation, they move nearly in lockstep. FXLCX charges 0.00%/yr vs 0.02%/yr for VIIIX.

Performance

FXLCX vs. VIIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Flex Large Cap Focused Index Fund (FXLCX) 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, FXLCX achieves a 10.01% return, which is significantly lower than VIIIX's 11.35% return.

FXLCX

• 1D: 0.51%
• 1M: 3.59%
• YTD: 10.01%
• 6M: 9.52%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

VIIIX

• 1D: 0.42%
• 1M: 3.50%
• YTD: 11.35%
• 6M: 11.03%
• 1Y: 27.91%
• 3Y*: 23.12%
• 5Y*: 14.15%
• 10Y*: 15.64%

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

FXLCX vs. VIIIX - Yearly Performance Comparison

	2026 (YTD)	2025
FXLCX Fidelity Flex Large Cap Focused Index Fund	10.01%	7.64%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	11.35%	8.03%

Correlation

The correlation between FXLCX and VIIIX is 0.99 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (All Time) Calculated using the full available price history since Jul 30, 2025	0.99

Return for Risk

FXLCX vs. VIIIX — Risk / Return Rank

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

VIIIX

VIIIX Risk / Return Rank: 73
VIIIX Sharpe Ratio Rank: 73
VIIIX Sortino Ratio Rank: 66
VIIIX Omega Ratio Rank: 67
VIIIX Calmar Ratio Rank: 74
VIIIX Martin Ratio Rank: 84

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.

FXLCX vs. VIIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Flex Large Cap Focused Index Fund (FXLCX) 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	FXLCX	VIIIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	2.42	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.84	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.87	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.76	0.49	+1.27

Drawdowns

FXLCX vs. VIIIX - Drawdown Comparison

The maximum FXLCX drawdown since its inception was -9.23%, smaller than the maximum VIIIX drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for FXLCX and VIIIX.

Drawdown Indicators

	FXLCX	VIIIX	Difference
Max Drawdown Largest peak-to-trough decline	-9.23%	-55.18%	+45.95%
Max Drawdown (1Y) Largest decline over 1 year	—	-8.90%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-18.75%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-24.50%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.79%	—
Current Drawdown Current decline from peak	-0.34%	-0.31%	-0.03%
Average Drawdown Average peak-to-trough decline	-1.40%	-10.01%	+8.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.90%	—

Volatility

Volatility by Period

	FXLCX	VIIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	2.87%	—
Volatility (6M) Calculated over the trailing 6-month period	—	9.00%	—
Volatility (1Y) Calculated over the trailing 1-year period	12.53%	11.88%	+0.65%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	12.53%	16.89%	-4.36%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	12.53%	18.06%	-5.53%

FXLCX vs. VIIIX - Expense Ratio Comparison

FXLCX has a 0.00% expense ratio, which is lower than VIIIX's 0.02% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

FXLCX vs. VIIIX - Dividend Comparison

FXLCX's dividend yield for the trailing twelve months is around 0.43%, less than VIIIX's 2.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FXLCX Fidelity Flex Large Cap Focused Index Fund	0.43%	0.33%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	2.42%	2.11%	3.66%	2.66%	3.39%	4.79%	3.07%	2.86%	2.45%	1.84%	2.38%	2.47%

Frequently Asked Questions

Can I hold both FXLCX and VIIIX in my portfolio?

With a correlation of 0.99, FXLCX and VIIIX 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.