FLRN vs SPSB

FLRN—State Street SPDR Bloomberg Investment Grade Floating Rate ETF

SPSBAState Street SPDR Portfolio Short Term 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.

SPSB The short end of the corporate bond market, bought wholesale: roughly 1,600 investment-grade corporate bonds maturing in one to three years, for four basis points. Built as a cash-adjacent building block, not a yield swing.

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.

SPSB The fund seeks to track the price and yield performance of the Bloomberg U.S. 1-3 Year Corporate Bond Index before fees and expenses.

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.

• SPSB Costs 0.04% a year against a 0.19% median for investment-grade corporate bond funds. At the short end, where yields are thin, that gap is a real slice of what you keep.
• Nothing in the index matures past three years, so rate moves push the price around less than they do at intermediate corporate funds like SPIB or VCIT.ssga.com
• Roughly 1,600 bonds, market-cap weighted, reconstituted at each month end, with a $300 million minimum issue size. Income arrives monthly.ssga.com
• Trading since 2009 and now a multi-billion-dollar fund that changes hands actively, one of the sturdier implementations in its peer group.

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

• SPSB Pure corporate credit, no Treasury ballast. Investment-grade paper still reprices when spreads widen, short maturities or not.ssga.com
• Bonds roll off fast and get replaced at whatever the market pays, so the income stream follows prevailing rates in both directions.ssga.com
• The manager samples the index rather than buying every bond in it, so the portfolio can drift modestly from the benchmark.sec.gov

Full FLRN profile⁠

Full SPSB profile⁠