FLRN vs IGSB

FLRN—State Street SPDR Bloomberg Investment Grade Floating Rate ETF

IGSBAiShares 1-5 Year Investment Grade Corporate Bond ETF

In short

FLRN The floating-rate outlier on a shelf full of fixed-coupon short bond funds. FLRN owns investment-grade notes whose coupons reset with short-term rates, so the income tracks today's rates rather than the ones locked in years ago.

IGSB Corporate credit with the rate risk dialed down: roughly 4,700 investment-grade bonds, none maturing past five years, for four basis points. iShares has run it since 2007.

Stated mandate

FLRN The fund seeks to track, before fees and expenses, the price and yield performance of the Bloomberg U.S. Dollar Floating Rate Note < 5 Years Index. It provides exposure to investment-grade debt instruments with variable coupons and fixed spreads.

IGSB The fund seeks to track an index containing U.S. dollar-denominated investment-grade corporate bonds with remaining maturities from one through five years.

Why people hold it

• FLRN Variable coupons with a fixed spread mean rate moves show up in the payout rather than the price, which keeps interest-rate sensitivity low by design.ssga.com
• The index takes only USD investment-grade floating rate notes maturing in under five years with at least $300 million outstanding, a size screen that skews toward larger, widely held issues.ssga.com
• Trading since 2011, a multi-billion-dollar fund that pays monthly and spreads across roughly 600 notes. No exotic sleeve bolted onto the mandate.

• IGSB Four basis points a year, a fraction of the typical investment-grade corporate bond fund's fee and level with the cheapest tier of its peer group.
• One-to-five-year maturities mean prices move less when rates move than long-dated corporate funds. Same corporate credit, shorter leash.ishares.com
• Thousands of individual bonds tracking the ICE BofA 1-5 Year US Corporate Index, with income paid monthly.ishares.com
• Trading since 2007, actively traded, and one of the strongest builds in the investment-grade corporate group on cost, portfolio and execution.

Worth knowing

• FLRN At 0.15% it costs more than fixed-coupon short-term peers like VCSH (0.03%) and IGSB (0.04%). You are paying for the floating structure, not a cheaper version of the same thing.
• Resets cut both ways. When short-term rates climb the coupon follows, and when they fall the income follows them down.
• Rate protection is not credit protection. These are investment-grade corporate and government-related notes, and their prices still move with credit spreads.ssga.com

• IGSB Short maturities cut both ways: less price damage when rates rise, less lift when they fall.
• These are company bonds, not Treasuries. Investment grade, but credit spreads can widen and prices move with them.
• Only the front of the curve. Sibling IGIB runs 5-10 years and USIG spans broad maturities, both at the same fee.

Full FLRN profile⁠

Full IGSB profile⁠