ISPY vs. RBIL

Last updated Jun 21, 2026

ISPY (ProShares S&P 500 High Income ETF) and RBIL (F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF) are both exchange-traded funds - ISPY is a Derivative Income fund tracking the S&P 500 Daily Covered Call Index, while RBIL is a Inflation-Protected Bonds fund tracking the Bloomberg US Ultrashort TIPS 1-13 Months Index. Both are passively managed. Over the past year, ISPY returned 23.92% vs 4.01% for RBIL. At a correlation of -0.19, they often move in opposite directions. ISPY charges 0.55%/yr vs 0.17%/yr for RBIL.

Performance

ISPY vs. RBIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares S&P 500 High Income ETF (ISPY) and F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ISPY achieves a 8.48% return, which is significantly higher than RBIL's 2.37% return.

ISPY

• 1D: 1.03%
• 1M: -0.06%
• YTD: 8.48%
• 6M: 8.57%
• 1Y: 23.92%
• 3Y*: —
• 5Y*: —
• 10Y*: —

RBIL

• 1D: 0.06%
• 1M: -0.13%
• YTD: 2.37%
• 6M: 2.42%
• 1Y: 4.01%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

ISPY vs. RBIL - Yearly Performance Comparison

	2026 (YTD)	2025
ISPY ProShares S&P 500 High Income ETF	8.48%	11.38%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	2.37%	2.85%

Correlation

The correlation between ISPY and RBIL is -0.23, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.23
Correlation (All Time) Calculated using the full available price history since Feb 25, 2025	-0.19

Return for Risk

ISPY vs. RBIL — Risk / Return Rank

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

ISPY

ISPY Risk / Return Rank: 61
ISPY Sharpe Ratio Rank: 63
ISPY Sortino Ratio Rank: 56
ISPY Omega Ratio Rank: 59
ISPY Calmar Ratio Rank: 59
ISPY Martin Ratio Rank: 66

RBIL

RBIL Risk / Return Rank: 97
RBIL Sharpe Ratio Rank: 97
RBIL Sortino Ratio Rank: 98
RBIL Omega Ratio Rank: 98
RBIL Calmar Ratio Rank: 96
RBIL Martin Ratio Rank: 98

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.

ISPY vs. RBIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares S&P 500 High Income ETF (ISPY) and F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL). 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.

	ISPY	RBIL	Difference
Sharpe ratio: Return per unit of total volatility	1.97	4.36	-2.39
Sortino ratio: Return per unit of downside risk	2.58	6.72	-4.14
Omega ratio: Gain probability vs. loss probability	1.35	2.13	-0.78
Calmar ratio: Return relative to maximum drawdown	2.81	7.95	-5.15
Martin ratio: Return relative to average drawdown	11.61	48.27	-36.66

ISPY vs. RBIL - Sharpe Ratio Comparison

The current ISPY Sharpe Ratio is 1.97, which is lower than the RBIL Sharpe Ratio of 4.36. The chart below compares the historical Sharpe Ratios of ISPY and RBIL, 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

ISPY vs. RBIL - Drawdown Comparison

The maximum ISPY drawdown since its inception was -16.88%, which is greater than RBIL's maximum drawdown of -0.52%. Use the drawdown chart below to compare losses from any high point for ISPY and RBIL.

Drawdown Indicators

	ISPY	RBIL	Difference
Max Drawdown Largest peak-to-trough decline	-16.88%	-0.52%	-16.36%
Max Drawdown (1Y) Largest decline over 1 year	-8.43%	-0.52%	-7.91%
Current Drawdown Current decline from peak	-1.74%	-0.46%	-1.28%
Average Drawdown Average peak-to-trough decline	-2.09%	-0.07%	-2.02%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.03%	0.09%	+1.94%

Volatility

ISPY vs. RBIL - Volatility Comparison

ProShares S&P 500 High Income ETF (ISPY) has a higher volatility of 4.73% compared to F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) at 0.36%. This indicates that ISPY's price experiences larger fluctuations and is considered to be riskier than RBIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ISPY	RBIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.73%	0.36%	+4.37%
Volatility (6M) Calculated over the trailing 6-month period	9.50%	0.85%	+8.65%
Volatility (1Y) Calculated over the trailing 1-year period	11.99%	0.95%	+11.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	13.72%	1.07%	+12.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	13.72%	1.07%	+12.65%

ISPY vs. RBIL - Expense Ratio Comparison

ISPY has a 0.55% expense ratio, which is higher than RBIL's 0.17% expense ratio.

Dividends

ISPY vs. RBIL - Dividend Comparison

ISPY's dividend yield for the trailing twelve months is around 4.46%, more than RBIL's 4.38% yield.

Position	TTM	2025	2024
ISPY ProShares S&P 500 High Income ETF	4.46%	8.56%	9.84%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	4.38%	3.65%	0.00%

Frequently Asked Questions

Can I hold both ISPY and RBIL in my portfolio?

ISPY and RBIL have a correlation of -0.23, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ISPY or RBIL?

ISPY has higher volatility (4.73%) compared to RBIL (0.36%). In terms of maximum drawdown, ISPY dropped -16.88% vs RBIL's -0.52%.

Which ETF is better, ISPY or RBIL?

On 1-year performance, ISPY leads with 23.92% vs 4.01% for RBIL. On fees, RBIL is cheaper at 0.17% per year. On volatility, RBIL has been the lower-risk option at 0.36%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, ISPY or RBIL?

Over the 1-year period, ISPY has performed better with a 23.92% return vs 4.01%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, ISPY or RBIL?

RBIL is cheaper with a 0.17% expense ratio, compared with 0.55% for ISPY.

Which ETF pays a higher dividend yield, ISPY or RBIL?

ISPY has the higher dividend yield at 4.46%, compared with 4.38% for RBIL.

What is the main difference between ISPY and RBIL?

ISPY is categorized as Derivative Income, while RBIL is Inflation-Protected Bonds. ISPY tracks S&P 500 Daily Covered Call Index, while RBIL tracks Bloomberg US Ultrashort TIPS 1-13 Months Index. They also come from different issuers: ProShares and F/m. Their fees differ too: 0.55% for ISPY and 0.17% for RBIL.

Which has better risk-adjusted returns?

RBIL currently has the higher Sharpe Ratio (4.36 vs 1.97), 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.