SPSM vs. RB

Last updated Jun 4, 2026

SPSM (SPDR Portfolio S&P 600 Small Cap ETF) and RB (ProShares Russell 2000 Dynamic Daily Buffer ETF) are both exchange-traded funds - SPSM is a Small Cap Blend Equities fund tracking the S&P SmallCap 600 Index, while RB is a Defined Outcome fund tracking the Russell 2000. Both are passively managed. A 0.74 correlation means they provide meaningful diversification when combined. SPSM charges 0.05%/yr vs 0.58%/yr for RB.

Performance

SPSM vs. RB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SPDR Portfolio S&P 600 Small Cap ETF (SPSM) and ProShares Russell 2000 Dynamic Daily Buffer ETF (RB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPSM achieves a 15.28% return, which is significantly higher than RB's 6.76% return.

SPSM

• 1D: -0.92%
• 1M: 1.62%
• YTD: 15.28%
• 6M: 14.19%
• 1Y: 31.50%
• 3Y*: 14.42%
• 5Y*: 5.71%
• 10Y*: 10.77%

RB

• 1D: -0.17%
• 1M: 1.63%
• YTD: 6.76%
• 6M: 8.48%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

SPSM vs. RB - Yearly Performance Comparison

	2026 (YTD)	2025
SPSM SPDR Portfolio S&P 600 Small Cap ETF	15.28%	11.14%
RB ProShares Russell 2000 Dynamic Daily Buffer ETF	6.76%	10.58%

Correlation

The correlation between SPSM and RB is 0.74, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (All Time) Calculated using the full available price history since Jun 27, 2025	0.75

Return for Risk

SPSM vs. RB — Risk / Return Rank

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

SPSM

SPSM Risk / Return Rank: 58
SPSM Sharpe Ratio Rank: 52
SPSM Sortino Ratio Rank: 54
SPSM Omega Ratio Rank: 49
SPSM Calmar Ratio Rank: 72
SPSM Martin Ratio Rank: 65

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.

SPSM vs. RB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SPDR Portfolio S&P 600 Small Cap ETF (SPSM) and ProShares Russell 2000 Dynamic Daily Buffer ETF (RB). 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.

	SPSM	RB	Difference
Sharpe ratio Return per unit of total volatility	1.82	—	—
Sortino ratio Return per unit of downside risk	2.64	—	—
Omega ratio Gain probability vs. loss probability	1.32	—	—
Calmar ratio Return relative to maximum drawdown	3.63	—	—
Martin ratio Return relative to average drawdown	12.14	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	SPSM	RB	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.82	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.47	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	3.15	-2.70

Drawdowns

SPSM vs. RB - Drawdown Comparison

The maximum SPSM drawdown since its inception was -42.89%, which is greater than RB's maximum drawdown of -1.70%. Use the drawdown chart below to compare losses from any high point for SPSM and RB.

Drawdown Indicators

	SPSM	RB	Difference
Max Drawdown Largest peak-to-trough decline	-42.89%	-1.70%	-41.19%
Max Drawdown (1Y) Largest decline over 1 year	-8.72%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-27.94%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-27.94%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-42.89%	—	—
Current Drawdown Current decline from peak	-0.97%	-0.47%	-0.50%
Average Drawdown Average peak-to-trough decline	-7.93%	-0.41%	-7.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.60%	—	—

Volatility

Volatility by Period

	SPSM	RB	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.44%	—	—
Volatility (6M) Calculated over the trailing 6-month period	11.64%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	17.47%	6.21%	+11.26%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.43%	6.21%	+15.22%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.99%	6.21%	+16.78%

SPSM vs. RB - Expense Ratio Comparison

SPSM has a 0.05% expense ratio, which is lower than RB's 0.58% expense ratio.

Dividends

SPSM vs. RB - Dividend Comparison

SPSM's dividend yield for the trailing twelve months is around 1.43%, less than RB's 2.00% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RB ProShares Russell 2000 Dynamic Daily Buffer ETF	2.00%	1.78%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SPSM SPDR Portfolio S&P 600 Small Cap ETF	1.43%	1.62%	1.85%	1.61%	1.38%	1.40%	1.34%	1.58%	1.82%	1.51%	1.49%	2.37%

Frequently Asked Questions

Can I hold both SPSM and RB in my portfolio?

SPSM and RB have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, SPSM or RB?

On fees, SPSM is cheaper at 0.05% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, SPSM or RB?

SPSM is cheaper with a 0.05% expense ratio, compared with 0.58% for RB.

Which ETF pays a higher dividend yield, SPSM or RB?

RB has the higher dividend yield at 2.00%, compared with 1.43% for SPSM.

What is the main difference between SPSM and RB?

SPSM is categorized as Small Cap Blend Equities, while RB is Defined Outcome. SPSM tracks S&P SmallCap 600 Index, while RB tracks Russell 2000. They also come from different issuers: State Street and ProShares. Their fees differ too: 0.05% for SPSM and 0.58% for RB.