AFDIX vs. FZALX

Last updated Jun 24, 2026

AFDIX (American Century Large Cap Equity Fund Investor Class) and FZALX (Fidelity Advisor Mega Cap Stock Fund Class Z) are both Large Cap Blend Equities funds. Over the past 10 years, AFDIX returned 14.60%/yr vs 17.07%/yr for FZALX. Their correlation of 0.93 suggests significant overlap in exposure. AFDIX charges 0.79%/yr vs 0.51%/yr for FZALX.

Performance

AFDIX vs. FZALX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Large Cap Equity Fund Investor Class (AFDIX) and Fidelity Advisor Mega Cap Stock Fund Class Z (FZALX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AFDIX achieves a 6.81% return, which is significantly lower than FZALX's 9.32% return. Over the past 10 years, AFDIX has underperformed FZALX with an annualized return of 14.60%, while FZALX has yielded a comparatively higher 17.07% annualized return.

AFDIX

• 1D: -0.43%
• 1M: 0.53%
• YTD: 6.81%
• 6M: 5.81%
• 1Y: 19.46%
• 3Y*: 16.21%
• 5Y*: 10.13%
• 10Y*: 14.60%

FZALX

• 1D: -0.76%
• 1M: -0.12%
• YTD: 9.32%
• 6M: 8.79%
• 1Y: 28.19%
• 3Y*: 25.22%
• 5Y*: 16.52%
• 10Y*: 17.07%

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

AFDIX vs. FZALX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AFDIX American Century Large Cap Equity Fund Investor Class	6.81%	11.17%	19.56%	24.21%	-19.52%	28.66%	19.27%	33.82%	-4.60%	25.78%
FZALX Fidelity Advisor Mega Cap Stock Fund Class Z	9.32%	27.07%	26.13%	26.63%	-8.89%	26.44%	13.06%	31.25%	-7.31%	18.01%

Correlation

The correlation between AFDIX and FZALX is 0.94, 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	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Aug 20, 2013	0.93

The correlation between AFDIX and FZALX has been stable across timeframes, ranging from 0.92 to 0.95 - a consistent structural relationship.

Return for Risk

AFDIX vs. FZALX — Risk / Return Rank

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

AFDIX

AFDIX Risk / Return Rank: 37
AFDIX Sharpe Ratio Rank: 36
AFDIX Sortino Ratio Rank: 34
AFDIX Omega Ratio Rank: 36
AFDIX Calmar Ratio Rank: 33
AFDIX Martin Ratio Rank: 46

FZALX

FZALX Risk / Return Rank: 75
FZALX Sharpe Ratio Rank: 76
FZALX Sortino Ratio Rank: 71
FZALX Omega Ratio Rank: 68
FZALX Calmar Ratio Rank: 76
FZALX Martin Ratio Rank: 83

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.

AFDIX vs. FZALX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Large Cap Equity Fund Investor Class (AFDIX) and Fidelity Advisor Mega Cap Stock Fund Class Z (FZALX). 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.

	AFDIX	FZALX	Difference
Sharpe ratio: Return per unit of total volatility	1.62	2.33	-0.71
Sortino ratio: Return per unit of downside risk	2.24	3.20	-0.96
Omega ratio: Gain probability vs. loss probability	1.29	1.42	-0.12
Calmar ratio: Return relative to maximum drawdown	2.04	3.25	-1.21
Martin ratio: Return relative to average drawdown	9.06	14.45	-5.40

AFDIX vs. FZALX - Sharpe Ratio Comparison

The current AFDIX Sharpe Ratio is 1.62, which is lower than the FZALX Sharpe Ratio of 2.33. The chart below compares the historical Sharpe Ratios of AFDIX and FZALX, 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

AFDIX vs. FZALX - Drawdown Comparison

The maximum AFDIX drawdown since its inception was -52.82%, which is greater than FZALX's maximum drawdown of -35.23%. Use the drawdown chart below to compare losses from any high point for AFDIX and FZALX.

Drawdown Indicators

	AFDIX	FZALX	Difference
Max Drawdown Largest peak-to-trough decline	-52.82%	-35.23%	-17.59%
Max Drawdown (1Y) Largest decline over 1 year	-10.16%	-8.99%	-1.17%
Max Drawdown (3Y) Largest decline over 3 years	-20.56%	-18.49%	-2.07%
Max Drawdown (5Y) Largest decline over 5 years	-26.53%	-23.25%	-3.28%
Max Drawdown (10Y) Largest decline over 10 years	-34.35%	-35.23%	+0.88%
Current Drawdown Current decline from peak	-1.72%	-1.42%	-0.30%
Average Drawdown Average peak-to-trough decline	-7.62%	-3.77%	-3.85%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.28%	2.02%	+0.26%

Volatility

AFDIX vs. FZALX - Volatility Comparison

American Century Large Cap Equity Fund Investor Class (AFDIX) has a higher volatility of 4.72% compared to Fidelity Advisor Mega Cap Stock Fund Class Z (FZALX) at 4.35%. This indicates that AFDIX's price experiences larger fluctuations and is considered to be riskier than FZALX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AFDIX	FZALX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.72%	4.35%	+0.37%
Volatility (6M) Calculated over the trailing 6-month period	10.13%	9.70%	+0.43%
Volatility (1Y) Calculated over the trailing 1-year period	12.81%	12.56%	+0.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.44%	16.76%	+0.68%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.66%	18.17%	+0.49%

AFDIX vs. FZALX - Expense Ratio Comparison

AFDIX has a 0.79% expense ratio, which is higher than FZALX's 0.51% expense ratio.

Dividends

AFDIX vs. FZALX - Dividend Comparison

AFDIX's dividend yield for the trailing twelve months is around 21.72%, more than FZALX's 3.69% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AFDIX American Century Large Cap Equity Fund Investor Class	21.72%	23.20%	6.67%	1.77%	0.63%	2.39%	0.41%	0.63%	8.69%	2.94%	1.18%	1.08%
FZALX Fidelity Advisor Mega Cap Stock Fund Class Z	3.69%	4.04%	2.83%	2.17%	4.51%	4.92%	8.14%	13.19%	21.94%	16.56%	2.12%	4.33%

Frequently Asked Questions

Can I hold both AFDIX and FZALX in my portfolio?

With a correlation of 0.94, AFDIX and FZALX 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, AFDIX or FZALX?

AFDIX has higher volatility (4.72%) compared to FZALX (4.35%). In terms of maximum drawdown, AFDIX dropped -52.82% vs FZALX's -35.23%.

Which has better risk-adjusted returns?

FZALX currently has the higher Sharpe Ratio (2.33 vs 1.62), 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.