GUNR vs. SKOR

Last updated Apr 2, 2026

Compare and contrast key facts about FlexShares Morningstar Global Upstream Natural Resources Index Fund (GUNR) and FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR).

GUNR and SKOR are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. GUNR is a passively managed fund by Northern Trust that tracks the performance of the Morningstar Global Upstream Natural Resources Index. It was launched on Sep 16, 2011. SKOR is a passively managed fund by Northern Trust that tracks the performance of the NorthernTrustUS Corporate Bond Quality Value Index. It was launched on Nov 12, 2014. Both GUNR and SKOR 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

GUNR vs. SKOR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in FlexShares Morningstar Global Upstream Natural Resources Index Fund (GUNR) and FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR). The values are adjusted to include any dividend payments, if applicable.

GUNR vs. SKOR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
GUNR FlexShares Morningstar Global Upstream Natural Resources Index Fund	20.73%	30.03%	-8.37%	-2.40%	14.83%	26.06%	0.46%	18.41%	-9.42%	18.74%
SKOR FlexShares Credit-Scored US Corporate Bond Index Fund	-0.20%	7.99%	4.42%	7.64%	-9.88%	-1.40%	8.84%	10.69%	-1.25%	4.38%

Returns By Period

In the year-to-date period, GUNR achieves a 20.73% return, which is significantly higher than SKOR's -0.20% return. Over the past 10 years, GUNR has outperformed SKOR with an annualized return of 12.13%, while SKOR has yielded a comparatively lower 2.90% annualized return.

GUNR

• 1D: -0.02%
• 1M: -0.96%
• YTD: 20.73%
• 6M: 27.72%
• 1Y: 45.55%
• 3Y*: 12.85%
• 5Y*: 12.39%
• 10Y*: 12.13%

SKOR

• 1D: 0.08%
• 1M: -1.05%
• YTD: -0.20%
• 6M: 0.86%
• 1Y: 5.35%
• 3Y*: 5.63%
• 5Y*: 1.91%
• 10Y*: 2.90%

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

GUNR vs. SKOR - Expense Ratio Comparison

GUNR has a 0.46% expense ratio, which is higher than SKOR's 0.22% expense ratio.

GUNR

FlexShares Morningstar Global Upstream Natural Resources Index Fund

SKOR

FlexShares Credit-Scored US Corporate Bond Index Fund

Return for Risk

GUNR vs. SKOR — Risk / Return Rank

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

GUNR

GUNR Risk / Return Rank: 95
GUNR Sharpe Ratio Rank: 95
GUNR Sortino Ratio Rank: 94
GUNR Omega Ratio Rank: 95
GUNR Calmar Ratio Rank: 92
GUNR Martin Ratio Rank: 97

SKOR

SKOR Risk / Return Rank: 82
SKOR Sharpe Ratio Rank: 82
SKOR Sortino Ratio Rank: 83
SKOR Omega Ratio Rank: 80
SKOR Calmar Ratio Rank: 82
SKOR Martin Ratio Rank: 81

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.

GUNR vs. SKOR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for FlexShares Morningstar Global Upstream Natural Resources Index Fund (GUNR) and FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR). 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.

	GUNR	SKOR	Difference
Sharpe ratio Return per unit of total volatility	2.44	1.64	+0.80
Sortino ratio Return per unit of downside risk	3.02	2.29	+0.73
Omega ratio Gain probability vs. loss probability	1.47	1.32	+0.15
Calmar ratio Return relative to maximum drawdown	3.46	2.47	+0.99
Martin ratio Return relative to average drawdown	19.38	9.55	+9.84
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

GUNR vs. SKOR - Sharpe Ratio Comparison

The current GUNR Sharpe Ratio is 2.44, which is higher than the SKOR Sharpe Ratio of 1.64. The chart below compares the historical Sharpe Ratios of GUNR and SKOR, 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

	GUNR	SKOR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.44	1.64	+0.80
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.65	0.43	+0.22
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	0.59	0.00
Sharpe Ratio (All Time) Calculated using the full available price history	0.33	0.62	-0.29

Correlation

The correlation between GUNR and SKOR is 0.07, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

GUNR vs. SKOR - Dividend Comparison

GUNR's dividend yield for the trailing twelve months is around 2.21%, less than SKOR's 4.72% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GUNR FlexShares Morningstar Global Upstream Natural Resources Index Fund	2.21%	2.81%	3.39%	3.55%	4.12%	3.61%	2.79%	3.25%	3.27%	2.00%	1.73%	4.50%
SKOR FlexShares Credit-Scored US Corporate Bond Index Fund	4.72%	4.70%	4.90%	3.90%	2.57%	2.55%	3.38%	3.53%	2.85%	2.46%	2.74%	2.25%

Drawdowns

GUNR vs. SKOR - Drawdown Comparison

The maximum GUNR drawdown since its inception was -45.64%, which is greater than SKOR's maximum drawdown of -15.98%. Use the drawdown chart below to compare losses from any high point for GUNR and SKOR.

Drawdown Indicators

	GUNR	SKOR	Difference
Max Drawdown Largest peak-to-trough decline	-45.64%	-15.98%	-29.66%
Max Drawdown (1Y) Largest decline over 1 year	-13.25%	-2.23%	-11.02%
Max Drawdown (5Y) Largest decline over 5 years	-24.06%	-15.13%	-8.93%
Max Drawdown (10Y) Largest decline over 10 years	-43.04%	-15.98%	-27.06%
Current Drawdown Current decline from peak	-0.96%	-1.30%	+0.34%
Average Drawdown Average peak-to-trough decline	-10.50%	-2.68%	-7.82%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.38%	0.58%	+1.80%

Volatility

GUNR vs. SKOR - Volatility Comparison

FlexShares Morningstar Global Upstream Natural Resources Index Fund (GUNR) has a higher volatility of 5.25% compared to FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR) at 1.35%. This indicates that GUNR's price experiences larger fluctuations and is considered to be riskier than SKOR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	GUNR	SKOR	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.25%	1.35%	+3.90%
Volatility (6M) Calculated over the trailing 6-month period	12.82%	1.86%	+10.96%
Volatility (1Y) Calculated over the trailing 1-year period	18.79%	3.28%	+15.51%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.09%	4.41%	+14.68%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.56%	4.91%	+15.65%