INKM vs. RBIL

Last updated Jun 24, 2026

INKM (SPDR SSgA Income Allocation ETF) and RBIL (F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF) are both exchange-traded funds - INKM is a Global Equities fund actively managed by State Street, while RBIL is a Inflation-Protected Bonds fund tracking the Bloomberg US Ultrashort TIPS 1-13 Months Index. INKM is actively managed, while RBIL is passively managed. Over the past year, INKM returned 12.31% vs 4.07% for RBIL. At a correlation of -0.14, they often move in opposite directions. INKM charges 0.50%/yr vs 0.17%/yr for RBIL.

Performance

INKM vs. RBIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SPDR SSgA Income Allocation ETF (INKM) 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, INKM achieves a 5.85% return, which is significantly higher than RBIL's 2.32% return.

INKM

• 1D: -0.06%
• 1M: 0.40%
• YTD: 5.85%
• 6M: 5.87%
• 1Y: 12.31%
• 3Y*: 10.08%
• 5Y*: 4.04%
• 10Y*: 5.70%

RBIL

• 1D: 0.01%
• 1M: -0.19%
• YTD: 2.32%
• 6M: 2.37%
• 1Y: 4.07%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

INKM vs. RBIL - Yearly Performance Comparison

	2026 (YTD)	2025
INKM SPDR SSgA Income Allocation ETF	5.85%	9.08%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	2.32%	2.85%

Correlation

The correlation between INKM and RBIL is -0.15, 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	-0.15
Correlation (All Time) Calculated using the full available price history since Feb 25, 2025	-0.14

Return for Risk

INKM vs. RBIL — Risk / Return Rank

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

INKM

INKM Risk / Return Rank: 65
INKM Sharpe Ratio Rank: 68
INKM Sortino Ratio Rank: 68
INKM Omega Ratio Rank: 69
INKM Calmar Ratio Rank: 59
INKM Martin Ratio Rank: 63

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: 97

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.

INKM vs. RBIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SPDR SSgA Income Allocation ETF (INKM) 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.

	INKM	RBIL	Difference
Sharpe ratio: Return per unit of total volatility	2.03	4.35	-2.32
Sortino ratio: Return per unit of downside risk	2.88	6.69	-3.82
Omega ratio: Gain probability vs. loss probability	1.38	2.13	-0.75
Calmar ratio: Return relative to maximum drawdown	2.72	7.82	-5.11
Martin ratio: Return relative to average drawdown	10.66	42.95	-32.29

INKM vs. RBIL - Sharpe Ratio Comparison

The current INKM Sharpe Ratio is 2.03, which is lower than the RBIL Sharpe Ratio of 4.35. The chart below compares the historical Sharpe Ratios of INKM 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

INKM vs. RBIL - Drawdown Comparison

The maximum INKM drawdown since its inception was -28.58%, which is greater than RBIL's maximum drawdown of -0.52%. Use the drawdown chart below to compare losses from any high point for INKM and RBIL.

Drawdown Indicators

	INKM	RBIL	Difference
Max Drawdown Largest peak-to-trough decline	-28.58%	-0.52%	-28.06%
Max Drawdown (1Y) Largest decline over 1 year	-4.55%	-0.52%	-4.03%
Max Drawdown (3Y) Largest decline over 3 years	-9.25%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-19.18%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-28.58%	—	—
Current Drawdown Current decline from peak	-0.74%	-0.50%	-0.24%
Average Drawdown Average peak-to-trough decline	-3.68%	-0.07%	-3.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.16%	0.10%	+1.06%

Volatility

INKM vs. RBIL - Volatility Comparison

SPDR SSgA Income Allocation ETF (INKM) has a higher volatility of 1.83% compared to F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) at 0.36%. This indicates that INKM'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

	INKM	RBIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.83%	0.36%	+1.47%
Volatility (6M) Calculated over the trailing 6-month period	4.78%	0.85%	+3.93%
Volatility (1Y) Calculated over the trailing 1-year period	6.11%	0.95%	+5.16%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	8.32%	1.07%	+7.25%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.77%	1.07%	+8.70%

INKM vs. RBIL - Expense Ratio Comparison

INKM has a 0.50% expense ratio, which is higher than RBIL's 0.17% expense ratio.

Dividends

INKM vs. RBIL - Dividend Comparison

INKM's dividend yield for the trailing twelve months is around 4.85%, more than RBIL's 4.38% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
INKM SPDR SSgA Income Allocation ETF	4.85%	5.82%	4.83%	4.56%	5.03%	3.74%	3.88%	4.38%	4.08%	3.10%	3.39%	3.45%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	4.38%	3.65%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both INKM and RBIL in my portfolio?

INKM and RBIL have a correlation of -0.15, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, INKM or RBIL?

INKM has higher volatility (1.83%) compared to RBIL (0.36%). In terms of maximum drawdown, INKM dropped -28.58% vs RBIL's -0.52%.

Which ETF is better, INKM or RBIL?

On 1-year performance, INKM leads with 12.31% vs 4.07% 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, INKM or RBIL?

Over the 1-year period, INKM has performed better with a 12.31% return vs 4.07%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, INKM or RBIL?

RBIL is cheaper with a 0.17% expense ratio, compared with 0.50% for INKM.

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

INKM has the higher dividend yield at 4.85%, compared with 4.38% for RBIL.

What is the main difference between INKM and RBIL?

INKM is categorized as Global Equities, while RBIL is Inflation-Protected Bonds. They also come from different issuers: State Street and F/m. Their fees differ too: 0.50% for INKM and 0.17% for RBIL.

Which has better risk-adjusted returns?

RBIL currently has the higher Sharpe Ratio (4.35 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.