SPTB vs TROT

SPTBAState Street SPDR Portfolio Treasury ETF

TROTCInvesco MSCI Treasury Duration Rotation ETF

In short

SPTB State Street's Treasury slice of the Agg in one ticker: the whole curve from a year out to the long end, roughly 300 bonds, for three basis points. It arrived in 2024 as the Treasury building block in the SPDR Portfolio suite.

TROT Most Treasury funds pin you to one spot on the yield curve. TROT tracks an MSCI index built around duration rotation, shifting where it sits on the curve by rule instead of leaving the call to you.

Stated mandate

SPTB The fund seeks to track, before fees and expenses, the price and yield performance of the Bloomberg U.S. Treasury Index and provides exposure to U.S. Treasuries with at least one year remaining to maturity.

TROT The Fund seeks to track, before fees and expenses, the investment results of the MSCI U.S. Treasury Duration Rotation Select Bond Index.

Why people hold it

• SPTB Three basis points. The typical fund in the Treasury cohort charges about five times that, and SPTB undercuts iShares' GOVT at five while tying Vanguard's VTG.
• One ticker covers the full Treasury curve, everything with at least a year to maturity, instead of stacking separate short, intermediate and long sleeves.ssga.com
• Plain index replication of the Bloomberg U.S. Treasury Index: government paper only, no credit sleeve, no derivatives overlay in the mandate.ssga.com
• Pays income monthly, and the implementation ranks in the top quartile of its Treasury peer group on our review.

• TROT One ticker for curve positioning: the index is built to rotate duration, work that otherwise means shuffling between short- and long-dated Treasury funds yourself.
• It holds U.S. Treasury debt, roughly 100 positions, so the lever inside is interest-rate exposure rather than corporate credit risk.
• Plain-vanilla plumbing: a 1940 Act ETF from Invesco that pays quarterly and aims to match its index before fees and expenses.

Worth knowing

• SPTB Full-curve means long bonds are in the mix, so the price swings with interest rates far more than a short-term Treasury fund does.
• It launched in 2024, so the live record is short next to cohort veterans that have traded through multiple rate cycles.
• Moderately traded rather than the volume leader in its category, so bigger orders are worth routing with limits and a glance at the spread.

• TROT At 0.15% a year it costs more than single-maturity Treasury index funds such as VGIT at 0.03%. The rotation rules are what the extra fee buys.
• A 2026 launch, so the track record is short and the asset base is still small, which can mean wider bid-ask spreads than the category's heavyweights.
• Duration shifts with the index rules, so rate exposure here isn't a fixed number. That's a moving target inside a ladder or a set allocation.

Full SPTB profile⁠

Full TROT profile⁠