After hauling in $17.7 billion in October, a monthly record, fixed income exchange traded funds are spending plenty of time in the limelight.

The bond ETF conversation has been dominated by those funds with exposure to the long end of the yield curve because those ETFs have turned in stellar performances amid this year’s tumble for Treasury yields. Short duration bond ETFs have also been widely favored by investors preparing for the possibility of a 2015 interest rate hike by the Federal Reserve. [Short Duration Bond ETFs Have Plenty of Fans]

Somewhat forgotten have been middle maturity offerings. The FlexShares Credit‐Scored US Corporate Bond Index Fund (NasdaqGM: SKOR), which debuted Thursday has the potential to change that. SKOR focuses on investment-grade corporate bonds with middle maturities ranging from two to 10 years.

That gives the SKOR a weighted average effective duration of 4.72 years, which is about three years less than the effective duration of 7.76 years on the iShares iBoxx $ Investment Grade Corporate Bond ETF (NYSEArca: LQD).

“Regulatory changes impacting the fixed income capital markets and persistent low interest rates have caused institutional investors and financial advisors to reassess their investment options for exposure to corporate bonds,” said Shundrawn A. Thomas, head of Northern Trust’s Funds and Managed Accounts Group, in a statement. “The FlexShares Credit‐Scored US Corporate Bond Index Fund employs a rules-based methodology that incorporates forward-looking financial metrics to optimize credit risk while providing improved transparency and liquidity as compared to legacy corporate bond benchmarks.”

Importantly, SKOR is not the run of the mill corporate bond ETF. The new ETF tracks the Northern Trust Credit-Scored US Corporate Bond Index, which focuses issues from companies with quality characteristics such as strength in management efficiency, profitability, and solvency, according to FlexShares.

SKOR’s underlying index only includes issues with at least $500 million outstanding. SKOR intentionally excludes smaller, illiquid issues to enhance its liquidity and transparency profile. Over 60% of the ETF’s 95 holdings are rated AA or A by Standard & Poor’s.