BSIIX vs. VWINX

Last updated Jun 20, 2026

BSIIX (BlackRock Strategic Income Opportunities Fund Class I) and VWINX (Vanguard Wellesley Income Fund Investor Shares) are both mutual funds - BSIIX is a Total Bond Market fund managed by BlackRock, while VWINX is a Diversified Portfolio fund actively managed by Vanguard. Over the past 10 years, BSIIX returned 3.85%/yr vs 5.77%/yr for VWINX. At a 0.40 correlation, their price movements are largely independent. BSIIX charges 0.69%/yr vs 0.22%/yr for VWINX.

Performance

BSIIX vs. VWINX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Strategic Income Opportunities Fund Class I (BSIIX) and Vanguard Wellesley Income Fund Investor Shares (VWINX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BSIIX achieves a 2.00% return, which is significantly lower than VWINX's 3.39% return. Over the past 10 years, BSIIX has underperformed VWINX with an annualized return of 3.85%, while VWINX has yielded a comparatively higher 5.77% annualized return.

BSIIX

• 1D: -0.10%
• 1M: 1.23%
• YTD: 2.00%
• 6M: 2.57%
• 1Y: 6.95%
• 3Y*: 6.84%
• 5Y*: 3.01%
• 10Y*: 3.85%

VWINX

• 1D: 0.26%
• 1M: 1.12%
• YTD: 3.39%
• 6M: 3.55%
• 1Y: 10.49%
• 3Y*: 8.40%
• 5Y*: 4.24%
• 10Y*: 5.77%

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

BSIIX vs. VWINX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BSIIX BlackRock Strategic Income Opportunities Fund Class I	2.00%	8.59%	5.22%	6.18%	-6.14%	0.80%	7.22%	7.65%	-0.42%	4.89%
VWINX Vanguard Wellesley Income Fund Investor Shares	3.39%	10.98%	5.86%	6.99%	-9.09%	8.48%	8.44%	16.39%	-2.54%	9.29%

Correlation

The correlation between BSIIX and VWINX is 0.63, 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	0.63
Correlation (3Y) Calculated over the trailing 3-year period	0.63
Correlation (5Y) Calculated over the trailing 5-year period	0.58
Correlation (10Y) Calculated over the trailing 10-year period	0.50
Correlation (All Time) Calculated using the full available price history since Feb 7, 2008	0.40

Over the past year, BSIIX and VWINX have become more correlated (0.63) than their long-term average of 0.40, meaning their price movements have been converging.

Return for Risk

BSIIX vs. VWINX — Risk / Return Rank

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

BSIIX

BSIIX Risk / Return Rank: 69
BSIIX Sharpe Ratio Rank: 79
BSIIX Sortino Ratio Rank: 86
BSIIX Omega Ratio Rank: 83
BSIIX Calmar Ratio Rank: 48
BSIIX Martin Ratio Rank: 50

VWINX

VWINX Risk / Return Rank: 56
VWINX Sharpe Ratio Rank: 60
VWINX Sortino Ratio Rank: 63
VWINX Omega Ratio Rank: 58
VWINX Calmar Ratio Rank: 51
VWINX Martin Ratio Rank: 51

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.

BSIIX vs. VWINX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Strategic Income Opportunities Fund Class I (BSIIX) and Vanguard Wellesley Income Fund Investor Shares (VWINX). 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.

	BSIIX	VWINX	Difference
Sharpe ratio: Return per unit of total volatility	2.36	2.03	+0.33
Sortino ratio: Return per unit of downside risk	3.73	2.92	+0.81
Omega ratio: Gain probability vs. loss probability	1.50	1.37	+0.13
Calmar ratio: Return relative to maximum drawdown	2.46	2.53	-0.08
Martin ratio: Return relative to average drawdown	9.49	9.52	-0.02

BSIIX vs. VWINX - Sharpe Ratio Comparison

The current BSIIX Sharpe Ratio is 2.36, which is comparable to the VWINX Sharpe Ratio of 2.03. The chart below compares the historical Sharpe Ratios of BSIIX and VWINX, 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

BSIIX vs. VWINX - Drawdown Comparison

The maximum BSIIX drawdown since its inception was -18.76%, smaller than the maximum VWINX drawdown of -21.72%. Use the drawdown chart below to compare losses from any high point for BSIIX and VWINX.

Drawdown Indicators

	BSIIX	VWINX	Difference
Max Drawdown Largest peak-to-trough decline	-18.76%	-21.72%	+2.96%
Max Drawdown (1Y) Largest decline over 1 year	-2.84%	-4.16%	+1.32%
Max Drawdown (3Y) Largest decline over 3 years	-2.84%	-6.98%	+4.14%
Max Drawdown (5Y) Largest decline over 5 years	-9.13%	-15.30%	+6.17%
Max Drawdown (10Y) Largest decline over 10 years	-9.91%	-17.43%	+7.52%
Current Drawdown Current decline from peak	-0.31%	-0.35%	+0.04%
Average Drawdown Average peak-to-trough decline	-1.80%	-2.63%	+0.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.73%	1.10%	-0.37%

Volatility

BSIIX vs. VWINX - Volatility Comparison

The current volatility for BlackRock Strategic Income Opportunities Fund Class I (BSIIX) is 0.92%, while Vanguard Wellesley Income Fund Investor Shares (VWINX) has a volatility of 1.63%. This indicates that BSIIX experiences smaller price fluctuations and is considered to be less risky than VWINX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BSIIX	VWINX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.92%	1.63%	-0.71%
Volatility (6M) Calculated over the trailing 6-month period	2.37%	3.92%	-1.55%
Volatility (1Y) Calculated over the trailing 1-year period	2.96%	5.20%	-2.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.65%	6.99%	-3.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.15%	6.93%	-3.78%

BSIIX vs. VWINX - Expense Ratio Comparison

BSIIX has a 0.69% expense ratio, which is higher than VWINX's 0.22% expense ratio.

Dividends

BSIIX vs. VWINX - Dividend Comparison

BSIIX's dividend yield for the trailing twelve months is around 5.15%, less than VWINX's 8.64% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BSIIX BlackRock Strategic Income Opportunities Fund Class I	5.15%	5.07%	4.75%	3.33%	3.58%	2.98%	2.92%	3.54%	3.32%	3.45%	2.91%	3.19%
VWINX Vanguard Wellesley Income Fund Investor Shares	8.64%	7.86%	6.61%	4.73%	7.67%	6.03%	4.30%	3.94%	7.56%	3.20%	4.00%	5.60%

Frequently Asked Questions

Can I hold both BSIIX and VWINX in my portfolio?

BSIIX and VWINX have a correlation of 0.63, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BSIIX or VWINX?

VWINX has higher volatility (1.63%) compared to BSIIX (0.92%). In terms of maximum drawdown, BSIIX dropped -18.76% vs VWINX's -21.72%.

Which has better risk-adjusted returns?

BSIIX currently has the higher Sharpe Ratio (2.36 vs 2.03), 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.