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VTEB vs. OILK
Performance
Return for Risk
Drawdowns
Volatility
Dividends

VTEB vs. OILK

Last updated Jun 3, 2026

VTEB (Vanguard Tax-Exempt Bond ETF) and OILK (ProShares K-1 Free Crude Oil Strategy ETF) are both exchange-traded funds - VTEB is a Municipal Bonds fund tracking the S&P National AMT-Free Municipal Bond Index, while OILK is a Oil & Gas fund tracking the Bloomberg Commodity Balanced WTI Crude Oil Index. Both are passively managed. Over the past 5 years, VTEB returned 0.93%/yr vs 17.52%/yr for OILK. At a correlation of -0.09, they often move in opposite directions. VTEB charges 0.05%/yr vs 0.68%/yr for OILK.

Performance

VTEB vs. OILK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Tax-Exempt Bond ETF (VTEB) and ProShares K-1 Free Crude Oil Strategy ETF (OILK). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, VTEB achieves a 1.52% return, which is significantly lower than OILK's 61.95% return.

VTEB

1D
0.10%
1M
0.61%
YTD
1.52%
6M
1.95%
1Y
7.14%
3Y*
3.59%
5Y*
0.93%
10Y*
2.10%

OILK

1D
1.15%
1M
0.89%
YTD
61.95%
6M
59.31%
1Y
57.89%
3Y*
18.48%
5Y*
17.52%
10Y*
—
*Multi-year figures are annualized to reflect compound growth (CAGR)

VTEB vs. OILK - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
VTEB
Vanguard Tax-Exempt Bond ETF		1.52%3.72%1.31%6.15%-7.99%1.14%5.19%7.35%1.04%4.87%
OILK
ProShares K-1 Free Crude Oil Strategy ETF		61.95%-11.86%8.18%-0.97%27.57%63.71%-61.09%30.48%-20.40%2.82%

Correlation

The correlation between VTEB and OILK is -0.29, 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

-0.29

Correlation (3Y)
Calculated over the trailing 3-year period

-0.15

Correlation (5Y)
Calculated over the trailing 5-year period

-0.10

Correlation (All Time)
Calculated using the full available price history since Sep 29, 2016

-0.09

Over the past year, the inverse relationship between VTEB and OILK has strengthened: their correlation has moved from -0.09 to -0.29, meaning they now move in opposite directions more often than their long-term average.

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.

Vanguard Tax-Exempt Bond ETF

ProShares K-1 Free Crude Oil Strategy ETF

Often compared with VTEB:
VTEB vs. MUBVTEB vs. VTESVTEB vs. BNDVTEB vs. VWIUXVTEB vs. VTEIVTEB vs. VWAHXVTEB vs. VTEAX
Often compared with OILK:
OILK vs. USOOILK vs. GUSHOILK vs. DBOOILK vs. USOIOILK vs. WTMFOILK vs. AMOMOILK vs. REVS

Return for Risk

VTEB vs. OILK — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
VTEB
VTEB Risk / Return Rank: 7272
Overall Rank
VTEB Sharpe Ratio Rank: 8080
Sharpe Ratio Rank
VTEB Sortino Ratio Rank: 8686
Sortino Ratio Rank
VTEB Omega Ratio Rank: 8989
Omega Ratio Rank
VTEB Calmar Ratio Rank: 5151
Calmar Ratio Rank
VTEB Martin Ratio Rank: 5353
Martin Ratio Rank
OILK
OILK Risk / Return Rank: 5656
Overall Rank
OILK Sharpe Ratio Rank: 5959
Sharpe Ratio Rank
OILK Sortino Ratio Rank: 5252
Sortino Ratio Rank
OILK Omega Ratio Rank: 5454
Omega Ratio Rank
OILK Calmar Ratio Rank: 7171
Calmar Ratio Rank
OILK Martin Ratio Rank: 4444
Martin Ratio Rank
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.

VTEB vs. OILK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Tax-Exempt Bond ETF (VTEB) and ProShares K-1 Free Crude Oil Strategy ETF (OILK). 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.

VTEBOILKDifference

Sharpe ratio

Return per unit of total volatility

2.64

2.03

+0.62

Sortino ratio

Return per unit of downside risk

3.92

2.55

+1.37

Omega ratio

Gain probability vs. loss probability

1.58

1.34

+0.24

Calmar ratio

Return relative to maximum drawdown

2.58

3.61

-1.03

Martin ratio

Return relative to average drawdown

9.21

7.33

+1.88

Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VTEB vs. OILK - Sharpe Ratio Comparison

The current VTEB Sharpe Ratio is 2.64, which is higher than the OILK Sharpe Ratio of 2.03. The chart below compares the historical Sharpe Ratios of VTEB and OILK, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Sharpe Ratios by Period

VTEBOILKDifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

2.64

2.03

+0.62

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.24

0.59

-0.35

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.40

—

—

Sharpe Ratio (All Time)

Calculated using the full available price history

0.48

0.11

+0.36

Drawdowns

VTEB vs. OILK - Drawdown Comparison

The maximum VTEB drawdown since its inception was -17.00%, smaller than the maximum OILK drawdown of -83.76%. Use the drawdown chart below to compare losses from any high point for VTEB and OILK.

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Drawdown Indicators

VTEBOILKDifference

Max Drawdown

Largest peak-to-trough decline

-17.00%

-83.76%

+66.76%

Max Drawdown (1Y)

Largest decline over 1 year

-2.71%

-17.35%

+14.64%

Max Drawdown (3Y)

Largest decline over 3 years

-5.53%

-23.42%

+17.89%

Max Drawdown (5Y)

Largest decline over 5 years

-12.64%

-34.69%

+22.05%

Max Drawdown (10Y)

Largest decline over 10 years

-17.00%

—

—

Current Drawdown

Current decline from peak

-0.46%

-4.99%

+4.53%

Average Drawdown

Average peak-to-trough decline

-2.33%

-32.62%

+30.29%

Ulcer Index

Depth and duration of drawdowns from previous peaks

0.76%

8.56%

-7.80%

Volatility

VTEB vs. OILK - Volatility Comparison

The current volatility for Vanguard Tax-Exempt Bond ETF (VTEB) is 0.90%, while ProShares K-1 Free Crude Oil Strategy ETF (OILK) has a volatility of 11.11%. This indicates that VTEB experiences smaller price fluctuations and is considered to be less risky than OILK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

VTEBOILKDifference

Volatility (1M)

Calculated over the trailing 1-month period

0.90%

11.11%

-10.21%

Volatility (6M)

Calculated over the trailing 6-month period

2.03%

23.24%

-21.21%

Volatility (1Y)

Calculated over the trailing 1-year period

2.72%

28.86%

-26.14%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

3.90%

30.11%

-26.21%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

5.26%

35.98%

-30.72%

VTEB vs. OILK - Expense Ratio Comparison

VTEB has a 0.05% expense ratio, which is lower than OILK's 0.68% expense ratio.

Dividends

VTEB vs. OILK - Dividend Comparison

VTEB's dividend yield for the trailing twelve months is around 3.35%, less than OILK's 8.29% yield.

PositionTTM20252024202320222021202020192018201720162015
OILK
ProShares K-1 Free Crude Oil Strategy ETF		8.29%4.79%3.11%5.80%17.32%68.82%0.13%0.94%0.58%6.17%0.00%0.00%
VTEB
Vanguard Tax-Exempt Bond ETF		3.35%3.29%3.14%2.79%2.09%1.64%1.99%2.30%2.25%1.96%1.66%0.58%

Frequently Asked Questions

VTEB and OILK have a correlation of -0.29, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

OILK has higher volatility (11.11%) compared to VTEB (0.90%). In terms of maximum drawdown, VTEB dropped -17.00% vs OILK's -83.76%.

On 5-year performance, OILK leads with 17.52% vs 0.93% for VTEB. On fees, VTEB is cheaper at 0.05% per year. On volatility, VTEB has been the lower-risk option at 0.90%. The better choice depends on whether you care most about return, fees, risk, or income.

Over the 5-year period, OILK has performed better with a 17.52% return vs 0.93%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

VTEB is cheaper with a 0.05% expense ratio, compared with 0.68% for OILK.

OILK has the higher dividend yield at 8.29%, compared with 3.35% for VTEB.

VTEB is categorized as Municipal Bonds, while OILK is Oil & Gas. VTEB tracks S&P National AMT-Free Municipal Bond Index, while OILK tracks Bloomberg Commodity Balanced WTI Crude Oil Index. They also come from different issuers: Vanguard and ProShares. Their fees differ too: 0.05% for VTEB and 0.68% for OILK.

VTEB currently has the higher Sharpe Ratio (2.64 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.

Portfolio Optimizer

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