BPSIX vs. BPIRX

Last updated Jun 24, 2026

BPSIX (Boston Partners Small Cap Value Fund Class I) and BPIRX (Boston Partners Long/Short Research Fund) are both mutual funds - BPSIX is a Small Cap Value Equities fund managed by Boston Partners, while BPIRX is a Long-Short fund managed by Boston Partners. Over the past 10 years, BPSIX returned 10.39%/yr vs 7.41%/yr for BPIRX. A 0.79 correlation means they provide meaningful diversification when combined. BPSIX charges 0.99%/yr vs 1.40%/yr for BPIRX.

Performance

BPSIX vs. BPIRX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Boston Partners Small Cap Value Fund Class I (BPSIX) and Boston Partners Long/Short Research Fund (BPIRX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BPSIX achieves a 14.65% return, which is significantly higher than BPIRX's 5.63% return. Over the past 10 years, BPSIX has outperformed BPIRX with an annualized return of 10.39%, while BPIRX has yielded a comparatively lower 7.41% annualized return.

BPSIX

• 1D: 0.24%
• 1M: 4.45%
• YTD: 14.65%
• 6M: 12.91%
• 1Y: 24.91%
• 3Y*: 17.49%
• 5Y*: 7.99%
• 10Y*: 10.39%

BPIRX

• 1D: 0.61%
• 1M: 2.56%
• YTD: 5.63%
• 6M: 5.03%
• 1Y: 14.82%
• 3Y*: 14.06%
• 5Y*: 10.88%
• 10Y*: 7.41%

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

BPSIX vs. BPIRX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BPSIX Boston Partners Small Cap Value Fund Class I	14.65%	7.45%	13.95%	16.98%	-11.48%	25.67%	1.60%	28.06%	-16.42%	9.72%
BPIRX Boston Partners Long/Short Research Fund	5.63%	14.90%	13.49%	4.75%	6.48%	23.74%	-8.25%	12.60%	-10.59%	10.10%

Correlation

The correlation between BPSIX and BPIRX is 0.79, 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	0.79
Correlation (3Y) Calculated over the trailing 3-year period	0.76
Correlation (5Y) Calculated over the trailing 5-year period	0.78
Correlation (10Y) Calculated over the trailing 10-year period	0.77
Correlation (All Time) Calculated using the full available price history since Oct 4, 2010	0.79

The correlation between BPSIX and BPIRX has been stable across timeframes, ranging from 0.76 to 0.79 - a consistent structural relationship.

Return for Risk

BPSIX vs. BPIRX — Risk / Return Rank

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

BPSIX

BPSIX Risk / Return Rank: 40
BPSIX Sharpe Ratio Rank: 38
BPSIX Sortino Ratio Rank: 42
BPSIX Omega Ratio Rank: 34
BPSIX Calmar Ratio Rank: 49
BPSIX Martin Ratio Rank: 38

BPIRX

BPIRX Risk / Return Rank: 46
BPIRX Sharpe Ratio Rank: 46
BPIRX Sortino Ratio Rank: 47
BPIRX Omega Ratio Rank: 45
BPIRX Calmar Ratio Rank: 43
BPIRX Martin Ratio Rank: 48

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.

BPSIX vs. BPIRX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Boston Partners Small Cap Value Fund Class I (BPSIX) and Boston Partners Long/Short Research Fund (BPIRX). 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.

	BPSIX	BPIRX	Difference
Sharpe ratio: Return per unit of total volatility	1.66	1.84	-0.17
Sortino ratio: Return per unit of downside risk	2.52	2.65	-0.13
Omega ratio: Gain probability vs. loss probability	1.29	1.33	-0.04
Calmar ratio: Return relative to maximum drawdown	2.57	2.38	+0.19
Martin ratio: Return relative to average drawdown	7.75	9.40	-1.66

BPSIX vs. BPIRX - Sharpe Ratio Comparison

The current BPSIX Sharpe Ratio is 1.66, which is comparable to the BPIRX Sharpe Ratio of 1.84. The chart below compares the historical Sharpe Ratios of BPSIX and BPIRX, 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

BPSIX vs. BPIRX - Drawdown Comparison

The maximum BPSIX drawdown since its inception was -62.51%, which is greater than BPIRX's maximum drawdown of -30.59%. Use the drawdown chart below to compare losses from any high point for BPSIX and BPIRX.

Drawdown Indicators

	BPSIX	BPIRX	Difference
Max Drawdown Largest peak-to-trough decline	-62.51%	-30.59%	-31.92%
Max Drawdown (1Y) Largest decline over 1 year	-10.39%	-6.46%	-3.93%
Max Drawdown (3Y) Largest decline over 3 years	-21.62%	-15.42%	-6.20%
Max Drawdown (5Y) Largest decline over 5 years	-22.01%	-15.42%	-6.59%
Max Drawdown (10Y) Largest decline over 10 years	-47.79%	-30.59%	-17.20%
Current Drawdown Current decline from peak	-0.30%	-0.34%	+0.04%
Average Drawdown Average peak-to-trough decline	-9.08%	-3.85%	-5.23%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.43%	1.63%	+1.80%

Volatility

BPSIX vs. BPIRX - Volatility Comparison

Boston Partners Small Cap Value Fund Class I (BPSIX) has a higher volatility of 4.50% compared to Boston Partners Long/Short Research Fund (BPIRX) at 2.62%. This indicates that BPSIX's price experiences larger fluctuations and is considered to be riskier than BPIRX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BPSIX	BPIRX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.50%	2.62%	+1.88%
Volatility (6M) Calculated over the trailing 6-month period	11.07%	6.57%	+4.50%
Volatility (1Y) Calculated over the trailing 1-year period	16.07%	8.38%	+7.69%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.71%	11.45%	+8.26%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.13%	11.70%	+10.43%

BPSIX vs. BPIRX - Expense Ratio Comparison

BPSIX has a 0.99% expense ratio, which is lower than BPIRX's 1.40% expense ratio.

Dividends

BPSIX vs. BPIRX - Dividend Comparison

BPSIX's dividend yield for the trailing twelve months is around 6.59%, less than BPIRX's 10.08% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BPIRX Boston Partners Long/Short Research Fund	10.08%	10.65%	11.38%	11.29%	20.90%	12.51%	0.00%	2.28%	5.50%	0.00%	0.00%	3.88%
BPSIX Boston Partners Small Cap Value Fund Class I	6.59%	7.56%	14.43%	12.77%	7.64%	7.03%	0.54%	2.42%	6.95%	4.50%	2.22%	5.29%

Frequently Asked Questions

Can I hold both BPSIX and BPIRX in my portfolio?

BPSIX and BPIRX have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BPSIX or BPIRX?

BPSIX has higher volatility (4.50%) compared to BPIRX (2.62%). In terms of maximum drawdown, BPSIX dropped -62.51% vs BPIRX's -30.59%.

Which has better risk-adjusted returns?

BPIRX currently has the higher Sharpe Ratio (1.84 vs 1.66), 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.