OIH vs. WEEK

Last updated Jun 5, 2026

OIH (VanEck Vectors Oil Services ETF) and WEEK (Roundhill Weekly T-Bill ETF) are both exchange-traded funds - OIH is a Energy Equities fund tracking the MVIS US Listed Oil Services 25 Index, while WEEK is a Ultrashort Bond fund actively managed by Roundhill. OIH is passively managed, while WEEK is actively managed. Over the past year, OIH returned 99.03% vs 3.80% for WEEK. At a correlation of -0.14, they often move in opposite directions. OIH charges 0.35%/yr vs 0.19%/yr for WEEK.

Performance

OIH vs. WEEK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in VanEck Vectors Oil Services ETF (OIH) and Roundhill Weekly T-Bill ETF (WEEK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OIH achieves a 54.15% return, which is significantly higher than WEEK's 1.43% return.

OIH

• 1D: 1.80%
• 1M: -0.39%
• YTD: 54.15%
• 6M: 45.31%
• 1Y: 99.03%
• 3Y*: 19.96%
• 5Y*: 14.03%
• 10Y*: -1.41%

WEEK

• 1D: -0.01%
• 1M: 0.26%
• YTD: 1.43%
• 6M: 1.74%
• 1Y: 3.80%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

OIH vs. WEEK - Yearly Performance Comparison

	2026 (YTD)	2025
OIH VanEck Vectors Oil Services ETF	54.15%	17.00%
WEEK Roundhill Weekly T-Bill ETF	1.43%	3.37%

Correlation

The correlation between OIH and WEEK is -0.20, 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	-0.20
Correlation (All Time) Calculated using the full available price history since Mar 7, 2025	-0.14

Return for Risk

OIH vs. WEEK — Risk / Return Rank

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

OIH

OIH Risk / Return Rank: 91
OIH Sharpe Ratio Rank: 93
OIH Sortino Ratio Rank: 89
OIH Omega Ratio Rank: 84
OIH Calmar Ratio Rank: 97
OIH Martin Ratio Rank: 94

WEEK

WEEK Risk / Return Rank: 99
WEEK Sharpe Ratio Rank: 99
WEEK Sortino Ratio Rank: 99
WEEK Omega Ratio Rank: 99
WEEK Calmar Ratio Rank: 99
WEEK Martin Ratio Rank: 99

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.

OIH vs. WEEK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for VanEck Vectors Oil Services ETF (OIH) and Roundhill Weekly T-Bill ETF (WEEK). 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.

	OIH	WEEK	Difference
Sharpe ratio: Return per unit of total volatility	3.39	9.26	-5.86
Sortino ratio: Return per unit of downside risk	4.06	19.07	-15.01
Omega ratio: Gain probability vs. loss probability	1.51	4.61	-3.10
Calmar ratio: Return relative to maximum drawdown	10.44	29.41	-18.96
Martin ratio: Return relative to average drawdown	25.98	262.85	-236.87
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OIH vs. WEEK - Sharpe Ratio Comparison

The current OIH Sharpe Ratio is 3.39, which is lower than the WEEK Sharpe Ratio of 9.26. The chart below compares the historical Sharpe Ratios of OIH and WEEK, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	OIH	WEEK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.39	9.26	-5.86
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.38	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.03	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.01	9.99	-9.99

Drawdowns

OIH vs. WEEK - Drawdown Comparison

The maximum OIH drawdown since its inception was -94.45%, which is greater than WEEK's maximum drawdown of -0.13%. Use the drawdown chart below to compare losses from any high point for OIH and WEEK.

Drawdown Indicators

	OIH	WEEK	Difference
Max Drawdown Largest peak-to-trough decline	-94.45%	-0.13%	-94.32%
Max Drawdown (1Y) Largest decline over 1 year	-9.54%	-0.13%	-9.41%
Max Drawdown (3Y) Largest decline over 3 years	-43.80%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-43.80%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-89.62%	—	—
Current Drawdown Current decline from peak	-60.91%	-0.01%	-60.90%
Average Drawdown Average peak-to-trough decline	-48.85%	-0.01%	-48.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.82%	0.01%	+3.81%

Volatility

OIH vs. WEEK - Volatility Comparison

VanEck Vectors Oil Services ETF (OIH) has a higher volatility of 8.15% compared to Roundhill Weekly T-Bill ETF (WEEK) at 0.08%. This indicates that OIH's price experiences larger fluctuations and is considered to be riskier than WEEK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OIH	WEEK	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.15%	0.08%	+8.07%
Volatility (6M) Calculated over the trailing 6-month period	20.40%	0.25%	+20.15%
Volatility (1Y) Calculated over the trailing 1-year period	29.38%	0.41%	+28.97%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	36.80%	0.39%	+36.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	42.41%	0.39%	+42.02%

OIH vs. WEEK - Expense Ratio Comparison

OIH has a 0.35% expense ratio, which is higher than WEEK's 0.19% expense ratio.

Dividends

OIH vs. WEEK - Dividend Comparison

OIH's dividend yield for the trailing twelve months is around 1.11%, less than WEEK's 3.72% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OIH VanEck Vectors Oil Services ETF	1.11%	1.71%	2.01%	1.36%	0.95%	0.98%	1.23%	2.10%	2.13%	2.60%	1.40%	2.39%
WEEK Roundhill Weekly T-Bill ETF	3.72%	3.27%	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 OIH and WEEK in my portfolio?

OIH and WEEK have a correlation of -0.20, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OIH or WEEK?

OIH has higher volatility (8.15%) compared to WEEK (0.08%). In terms of maximum drawdown, OIH dropped -94.45% vs WEEK's -0.13%.

Which ETF is better, OIH or WEEK?

On 1-year performance, OIH leads with 99.03% vs 3.80% for WEEK. On fees, WEEK is cheaper at 0.19% per year. On volatility, WEEK has been the lower-risk option at 0.08%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, OIH or WEEK?

Over the 1-year period, OIH has performed better with a 99.03% return vs 3.80%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, OIH or WEEK?

WEEK is cheaper with a 0.19% expense ratio, compared with 0.35% for OIH.

Which ETF pays a higher dividend yield, OIH or WEEK?

WEEK has the higher dividend yield at 3.72%, compared with 1.11% for OIH.

What is the main difference between OIH and WEEK?

OIH is categorized as Energy Equities, while WEEK is Ultrashort Bond. They also come from different issuers: VanEck and Roundhill. Their fees differ too: 0.35% for OIH and 0.19% for WEEK.

Which has better risk-adjusted returns?

WEEK currently has the higher Sharpe Ratio (9.26 vs 3.39), 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.