TFLO vs. AOK

Last updated Apr 2, 2026

Compare and contrast key facts about iShares Treasury Floating Rate Bond ETF (TFLO) and iShares Core Conservative Allocation ETF (AOK).

TFLO and AOK are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. TFLO is a passively managed fund by iShares that tracks the performance of the Barclays U.S. Treasury Floating Rate Index. It was launched on Feb 3, 2014. AOK is a passively managed fund by iShares that tracks the performance of the S&P Target Risk Conservative Index. It was launched on Nov 4, 2008. Both TFLO and AOK are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

TFLO vs. AOK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Treasury Floating Rate Bond ETF (TFLO) and iShares Core Conservative Allocation ETF (AOK). The values are adjusted to include any dividend payments, if applicable.

TFLO vs. AOK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TFLO iShares Treasury Floating Rate Bond ETF	0.94%	4.22%	5.34%	5.12%	1.99%	-0.02%	0.43%	2.04%	1.76%	1.01%
AOK iShares Core Conservative Allocation ETF	0.12%	11.26%	6.58%	10.85%	-14.16%	4.87%	9.33%	13.90%	-3.09%	9.70%

Returns By Period

In the year-to-date period, TFLO achieves a 0.94% return, which is significantly higher than AOK's 0.12% return. Over the past 10 years, TFLO has underperformed AOK with an annualized return of 2.27%, while AOK has yielded a comparatively higher 4.88% annualized return.

TFLO

• 1D: 0.02%
• 1M: 0.30%
• YTD: 0.94%
• 6M: 2.01%
• 1Y: 4.08%
• 3Y*: 4.85%
• 5Y*: 3.49%
• 10Y*: 2.27%

AOK

• 1D: 0.30%
• 1M: -2.35%
• YTD: 0.12%
• 6M: 1.18%
• 1Y: 9.60%
• 3Y*: 8.05%
• 5Y*: 3.38%
• 10Y*: 4.88%

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

TFLO vs. AOK - Expense Ratio Comparison

TFLO has a 0.15% expense ratio, which is lower than AOK's 0.25% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

AOK

iShares Core Conservative Allocation ETF

TFLO

iShares Treasury Floating Rate Bond ETF

Return for Risk

TFLO vs. AOK — Risk / Return Rank

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

TFLO

TFLO Risk / Return Rank: 100
TFLO Sharpe Ratio Rank: 100
TFLO Sortino Ratio Rank: 100
TFLO Omega Ratio Rank: 100
TFLO Calmar Ratio Rank: 100
TFLO Martin Ratio Rank: 100

AOK

AOK Risk / Return Rank: 76
AOK Sharpe Ratio Rank: 76
AOK Sortino Ratio Rank: 75
AOK Omega Ratio Rank: 74
AOK Calmar Ratio Rank: 79
AOK Martin Ratio Rank: 77

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.

TFLO vs. AOK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Treasury Floating Rate Bond ETF (TFLO) and iShares Core Conservative Allocation ETF (AOK). 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.

	TFLO	AOK	Difference
Sharpe ratio Return per unit of total volatility	13.82	1.42	+12.41
Sortino ratio Return per unit of downside risk	45.26	1.97	+43.28
Omega ratio Gain probability vs. loss probability	11.00	1.29	+9.72
Calmar ratio Return relative to maximum drawdown	207.22	2.22	+205.00
Martin ratio Return relative to average drawdown	736.01	8.55	+727.46
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TFLO vs. AOK - Sharpe Ratio Comparison

The current TFLO Sharpe Ratio is 13.82, which is higher than the AOK Sharpe Ratio of 1.42. The chart below compares the historical Sharpe Ratios of TFLO and AOK, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	TFLO	AOK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	13.82	1.42	+12.41
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	9.84	0.48	+9.36
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	4.54	0.73	+3.81
Sharpe Ratio (All Time) Calculated using the full available price history	0.97	0.69	+0.28

Correlation

The correlation between TFLO and AOK is -0.03. This indicates that the assets' prices tend to move in opposite directions. Negative correlation can be particularly beneficial for diversification and risk management, as one asset may offset the losses of the other during market fluctuations.

Dividends

TFLO vs. AOK - Dividend Comparison

TFLO's dividend yield for the trailing twelve months is around 4.00%, more than AOK's 3.34% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
TFLO iShares Treasury Floating Rate Bond ETF	4.00%	4.16%	5.21%	4.88%	1.68%	0.00%	0.36%	2.08%	1.65%	0.86%	0.31%	0.15%
AOK iShares Core Conservative Allocation ETF	3.34%	3.28%	3.23%	2.93%	2.25%	1.55%	2.10%	2.71%	2.68%	2.91%	2.14%	2.02%

Drawdowns

TFLO vs. AOK - Drawdown Comparison

The maximum TFLO drawdown since its inception was -5.01%, smaller than the maximum AOK drawdown of -18.94%. Use the drawdown chart below to compare losses from any high point for TFLO and AOK.

Drawdown Indicators

	TFLO	AOK	Difference
Max Drawdown Largest peak-to-trough decline	-5.01%	-18.94%	+13.93%
Max Drawdown (1Y) Largest decline over 1 year	-0.02%	-4.50%	+4.48%
Max Drawdown (5Y) Largest decline over 5 years	-0.13%	-18.94%	+18.81%
Max Drawdown (10Y) Largest decline over 10 years	-0.50%	-18.94%	+18.44%
Current Drawdown Current decline from peak	0.00%	-2.89%	+2.89%
Average Drawdown Average peak-to-trough decline	-0.10%	-2.38%	+2.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	1.17%	-1.16%

Volatility

TFLO vs. AOK - Volatility Comparison

The current volatility for iShares Treasury Floating Rate Bond ETF (TFLO) is 0.07%, while iShares Core Conservative Allocation ETF (AOK) has a volatility of 2.87%. This indicates that TFLO experiences smaller price fluctuations and is considered to be less risky than AOK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TFLO	AOK	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.07%	2.87%	-2.80%
Volatility (6M) Calculated over the trailing 6-month period	0.21%	4.25%	-4.04%
Volatility (1Y) Calculated over the trailing 1-year period	0.30%	6.80%	-6.50%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.36%	7.05%	-6.69%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.50%	6.68%	-6.18%