IGSB vs. SKOR

Last updated Apr 2, 2026

Compare and contrast key facts about iShares Short-Term Corporate Bond ETF (IGSB) and FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR).

IGSB and SKOR are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. IGSB is a passively managed fund by iShares that tracks the performance of the ICE BofAML 1-5 Year US Corporate Index. It was launched on Jan 11, 2007. 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 IGSB 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

IGSB vs. SKOR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Short-Term Corporate Bond ETF (IGSB) and FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR). The values are adjusted to include any dividend payments, if applicable.

IGSB vs. SKOR - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IGSB iShares Short-Term Corporate Bond ETF	0.24%	6.96%	4.97%	6.40%	-5.63%	-0.56%	5.37%	7.11%	1.25%	1.27%
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, IGSB achieves a 0.24% return, which is significantly higher than SKOR's -0.20% return. Over the past 10 years, IGSB has underperformed SKOR with an annualized return of 2.75%, while SKOR has yielded a comparatively higher 2.90% annualized return.

IGSB

• 1D: 0.10%
• 1M: -0.58%
• YTD: 0.24%
• 6M: 1.28%
• 1Y: 5.00%
• 3Y*: 5.52%
• 5Y*: 2.47%
• 10Y*: 2.75%

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)

IGSB vs. SKOR - Expense Ratio Comparison

IGSB has a 0.06% expense ratio, which is lower than SKOR's 0.22% 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%.

SKOR

FlexShares Credit-Scored US Corporate Bond Index Fund

IGSB

iShares Short-Term Corporate Bond ETF

Return for Risk

IGSB vs. SKOR — Risk / Return Rank

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

IGSB

IGSB Risk / Return Rank: 94
IGSB Sharpe Ratio Rank: 92
IGSB Sortino Ratio Rank: 95
IGSB Omega Ratio Rank: 94
IGSB Calmar Ratio Rank: 92
IGSB Martin Ratio Rank: 93

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.

IGSB vs. SKOR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Short-Term Corporate Bond ETF (IGSB) 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.

	IGSB	SKOR	Difference
Sharpe ratio Return per unit of total volatility	2.19	1.64	+0.55
Sortino ratio Return per unit of downside risk	3.24	2.29	+0.95
Omega ratio Gain probability vs. loss probability	1.45	1.32	+0.13
Calmar ratio Return relative to maximum drawdown	3.49	2.47	+1.02
Martin ratio Return relative to average drawdown	14.27	9.55	+4.72
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IGSB vs. SKOR - Sharpe Ratio Comparison

The current IGSB Sharpe Ratio is 2.19, which is higher than the SKOR Sharpe Ratio of 1.64. The chart below compares the historical Sharpe Ratios of IGSB 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

	IGSB	SKOR	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.19	1.64	+0.55
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.85	0.43	+0.42
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.80	0.59	+0.20
Sharpe Ratio (All Time) Calculated using the full available price history	0.70	0.62	+0.08

Correlation

The correlation between IGSB and SKOR is 0.72, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

IGSB vs. SKOR - Dividend Comparison

IGSB's dividend yield for the trailing twelve months is around 4.55%, less than SKOR's 4.72% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IGSB iShares Short-Term Corporate Bond ETF	4.55%	4.44%	4.02%	3.26%	2.07%	1.82%	2.36%	3.06%	2.46%	1.65%	1.45%	1.18%
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

IGSB vs. SKOR - Drawdown Comparison

The maximum IGSB drawdown since its inception was -13.38%, smaller than the maximum SKOR drawdown of -15.98%. Use the drawdown chart below to compare losses from any high point for IGSB and SKOR.

Drawdown Indicators

	IGSB	SKOR	Difference
Max Drawdown Largest peak-to-trough decline	-13.38%	-15.98%	+2.60%
Max Drawdown (1Y) Largest decline over 1 year	-1.46%	-2.23%	+0.77%
Max Drawdown (5Y) Largest decline over 5 years	-9.46%	-15.13%	+5.67%
Max Drawdown (10Y) Largest decline over 10 years	-13.38%	-15.98%	+2.60%
Current Drawdown Current decline from peak	-0.79%	-1.30%	+0.51%
Average Drawdown Average peak-to-trough decline	-0.85%	-2.68%	+1.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.36%	0.58%	-0.22%

Volatility

IGSB vs. SKOR - Volatility Comparison

The current volatility for iShares Short-Term Corporate Bond ETF (IGSB) is 0.97%, while FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR) has a volatility of 1.35%. This indicates that IGSB experiences smaller price fluctuations and is considered to be less risky than SKOR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IGSB	SKOR	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.97%	1.35%	-0.38%
Volatility (6M) Calculated over the trailing 6-month period	1.32%	1.86%	-0.54%
Volatility (1Y) Calculated over the trailing 1-year period	2.29%	3.28%	-0.99%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.91%	4.41%	-1.50%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.46%	4.91%	-1.45%