MAILX vs. FAOIX
MAILX (BlackRock International Fund of BlackRock Series, Inc.) and FAOIX (Fidelity Advisor Overseas Fund Class I) are both Foreign Large Cap Equities funds. Over the past 10 years, MAILX returned 8.86%/yr vs 7.58%/yr for FAOIX. Their correlation of 0.89 suggests significant overlap in exposure. MAILX charges 0.65%/yr vs 1.12%/yr for FAOIX.
Performance
MAILX vs. FAOIX - Performance Comparison
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Returns By Period
Over the past 10 years, MAILX has outperformed FAOIX with an annualized return of 8.86%, while FAOIX has yielded a comparatively lower 7.58% annualized return.
MAILX
- 1D
- -0.12%
- 1M
- 3.19%
- YTD
- 12.55%
- 6M
- 12.75%
- 1Y
- 23.65%
- 3Y*
- 12.05%
- 5Y*
- 2.52%
- 10Y*
- 8.86%
FAOIX
- 1D
- 0.00%
- 1M
- 0.00%
- YTD
- 0.00%
- 6M
- 0.00%
- 1Y
- -0.58%
- 3Y*
- 7.90%
- 5Y*
- 3.78%
- 10Y*
- 7.58%
MAILX vs. FAOIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MAILX BlackRock International Fund of BlackRock Series, Inc. | 12.55% | 15.60% | 0.46% | 19.67% | -24.24% | 9.32% | 21.82% | 31.77% | -21.45% | 31.87% |
FAOIX Fidelity Advisor Overseas Fund Class I | 0.00% | 15.25% | 4.92% | 20.35% | -24.38% | 19.23% | 15.08% | 27.82% | -14.85% | 30.05% |
Correlation
The correlation between MAILX and FAOIX is 0.50, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.50 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.77 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.84 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.86 |
Correlation (All Time) Calculated using the full available price history since Oct 30, 1998 | 0.89 |
Over the past year, the correlation between MAILX and FAOIX has dropped to 0.50 - well below their long-term average of 0.89, suggesting their price drivers have been diverging.
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Return for Risk
MAILX vs. FAOIX — Risk / Return Rank
MAILX
FAOIX
MAILX vs. FAOIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for BlackRock International Fund of BlackRock Series, Inc. (MAILX) and Fidelity Advisor Overseas Fund Class I (FAOIX). 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.
| MAILX | FAOIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.60 | ||
| Sortino ratioReturn per unit of downside risk | +2.19 | ||
| Omega ratioGain probability vs. loss probability | 1.28 | 1.00 | +0.28 |
| Calmar ratioReturn relative to maximum drawdown | 1.98 | -0.06 | +2.05 |
| Martin ratioReturn relative to average drawdown | 7.39 | -0.10 | +7.50 |
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Drawdowns
MAILX vs. FAOIX - Drawdown Comparison
The maximum MAILX drawdown since its inception was -59.57%, roughly equal to the maximum FAOIX drawdown of -59.86%. Use the drawdown chart below to compare losses from any high point for MAILX and FAOIX.
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Drawdown Indicators
| MAILX | FAOIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -59.57% | -59.86% | +0.29% |
Max Drawdown (1Y)Largest decline over 1 year | -12.34% | -7.28% | -5.06% |
Max Drawdown (3Y)Largest decline over 3 years | -17.36% | -13.98% | -3.38% |
Max Drawdown (5Y)Largest decline over 5 years | -41.68% | -36.33% | -5.35% |
Max Drawdown (10Y)Largest decline over 10 years | -41.68% | -36.33% | -5.35% |
Current DrawdownCurrent decline from peak | -0.20% | -5.85% | +5.65% |
Average DrawdownAverage peak-to-trough decline | -16.11% | -14.19% | -1.92% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.30% | 4.13% | -0.83% |
Volatility
MAILX vs. FAOIX - Volatility Comparison
BlackRock International Fund of BlackRock Series, Inc. (MAILX) has a higher volatility of 6.18% compared to Fidelity Advisor Overseas Fund Class I (FAOIX) at 0.00%. This indicates that MAILX's price experiences larger fluctuations and is considered to be riskier than FAOIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MAILX | FAOIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.18% | 0.00% | +6.18% |
Volatility (6M)Calculated over the trailing 6-month period | 13.58% | 3.63% | +9.95% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.84% | 8.78% | +7.06% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.02% | 16.72% | +1.30% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.38% | 16.65% | +1.73% |
MAILX vs. FAOIX - Expense Ratio Comparison
MAILX has a 0.65% expense ratio, which is lower than FAOIX's 1.12% expense ratio.
Dividends
MAILX vs. FAOIX - Dividend Comparison
MAILX's dividend yield for the trailing twelve months is around 1.59%, less than FAOIX's 8.49% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FAOIX Fidelity Advisor Overseas Fund Class I | 8.49% | 8.49% | 1.66% | 0.96% | 0.63% | 2.06% | 0.00% | 1.35% | 5.09% | 3.79% | 1.49% | 0.63% |
MAILX BlackRock International Fund of BlackRock Series, Inc. | 1.59% | 1.79% | 0.90% | 1.08% | 1.13% | 7.30% | 0.33% | 1.11% | 1.83% | 1.39% | 1.62% | 0.65% |
Frequently Asked Questions
MAILX and FAOIX have a correlation of 0.50, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MAILX has higher volatility (6.18%) compared to FAOIX (0.00%). In terms of maximum drawdown, MAILX dropped -59.57% vs FAOIX's -59.86%.
MAILX currently has the higher Sharpe Ratio (1.55 vs -0.05), 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.
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