Interest Rate Volatility Funds Lead Gains as Defined Maturity ETFs Dominate Flows

Share

Weekly Channel Summary

The FI: Specialty channel closed the week with $75.56B in total AUM spread across 168 ETFs from 14 issuers. Net flows were positive at $317M for the 5-day period, extending a strong year with $12,914M gathered YTD and $19,523M over the trailing 1-year period. The channel continues to see steady demand, driven primarily by defined maturity bond ladders and target-date corporate and government products.

This Week’s Performance Leaders and Laggards

Specialty – Maturing Ladder led the channel on a weekly basis with a 1.03% gain, reversing some of its negative YTD trend of -1.07%. Specialty – Defined Maturity posted a modest 0.29% WTD return and remains the largest category by far, with YTD performance of 0.63% and a 1-year gain of 1.24%. Specialty – Interest Rate Volatility was the weekly laggard at -1.63%, though it remains the standout performer over longer horizons with a 9.64% 6-month return and 10.77% over the trailing year. The divergence highlights how rate-hedge vehicles can see short-term pullbacks even amid strong multi-month trends.

Category Performance Snapshot

Category WTD 1 Month 3 Month 6 Month YTD 1 Year
Specialty – Maturing Ladder 1.03% 0.15% -1.51% -1.70% -1.07% -1.50%
Specialty – Defined Maturity 0.29% 0.15% -0.38% -0.02% 0.63% 1.24%
Specialty – Interest Rate Volatility -1.63% 4.45% 7.68% 9.64% 8.03% 10.77%

Top & Bottom 5 ETFs by Weekly Performance

Long-dated Treasury ladder funds topped the weekly leaderboard, with IBGL gaining 2.62% and IBGK close behind at 2.60%, alongside strong showings from the LifeX longevity income suite. On the downside, PFIX was the clear laggard, falling 5.06% for the week as rate-hedge positioning reversed. High yield-focused term funds such as IBHK and BSJV also lagged, each down less than 1.2% for the week, consistent with modest pressure across credit-sensitive maturity products.

Ticker Fund Name WTD Performance
Top Performers
IBGL iShares iBonds Dec 2055 Term Treasury ETF 2.62%
IBGK iShares iBonds Dec 2054 Term Treasury ETF 2.60%
IBGM iShares iBonds Dec 2056 Term Treasury ETF 2.59%
LIBD LifeX 2065 Inflation-Protected Longevity Income ETF 2.57%
LIAU LifeX 2060 Inflation-Protected Longevity Income ETF 2.31%
Bottom Performers
PFIX Simplify Interest Rate Hedge ETF -5.06%
IBHK iShares iBonds 2031 Term High Yield and Income ETF -1.18%
BSJV Invesco BulletShares 2031 High Yield Corporate Bond ETF -0.94%
MYHE State Street My2031 High Yield Corporate Bond ETF -0.84%
RISR FolioBeyond Alternative Income and Interest Rate Hedge ETF -0.83%

Analyzing the Weekly Flows

The channel attracted $317M in net inflows for the week, led overwhelmingly by the Specialty – Defined Maturity category with $252M, while Specialty – Interest Rate Volatility added a further $60M despite its weak weekly performance. By segment, Government funds gathered the most new capital at $198M, followed by Corporate at $75M and Municipal at $44M. Duration flows showed a clear preference for longer-dated maturities, with the 2026 bucket seeing the largest outflow of -$315M as funds roll off, while 2029 and 2030 vintages led inflows with $181M and $115M respectively.

Flows by Category

Category Fund Count AUM 5 Day 30 Day 90 Day YTD 1 Year
Specialty – Defined Maturity 132 $74.38B $252M $1,313M $3,660M $12,847M $19,445M
Specialty – Interest Rate Volatility 8 $1.00B $60M $96M $87M $40M $100M
Specialty – Maturing Ladder 28 $181M $4M $9M -$0M $27M -$21M

Flows by Segment

Segment Fund Count AUM 5 Day 30 Day 90 Day YTD 1 Year
Government 66 $14.22B $198M $752M $1,643M $3,611M $4,927M
Corporate 66 $55.83B $75M $473M $1,671M $8,084M $12,842M
Municipal 36 $5.51B $44M $193M $433M $1,219M $1,755M

Flows by Duration

Duration Fund Count AUM 5 Day 30 Day 90 Day YTD 1 Year
Duration: 2026 9 $10.07B -$315M -$834M -$1,989M -$3,505M -$2,661M
Duration: 2027 13 $13.74B -$8M $112M $571M $1,754M $2,496M
Duration: 2028 14 $13.40B $37M $320M $1,043M $3,505M $4,672M
Duration: 2029 13 $10.76B $181M $350M $713M $2,540M $3,629M
Duration: 2030 17 $8.83B $115M $353M $907M $2,554M $3,672M
Duration: 2031 15 $6.11B $96M $292M $755M $1,921M $2,415M
Duration: 2032 13 $4.40B $23M $116M $379M $1,092M $1,542M
Duration: 2033 11 $3.09B $23M $134M $347M $829M $1,024M
Duration: 2034 10 $2.14B $22M $141M $274M $835M $1,089M
Duration: 2035 13 $1.34B $19M $158M $320M $868M $1,054M
Duration: 2036 9 $416M $51M $169M $279M $385M $385M
Duration: 2044 1 $71M $0M -$2M -$25M -$7M $2M
Duration: 2045 3 $23M $0M $0M $3M $3M $4M
Duration: 2046 3 $69M $7M $9M $49M $57M $57M
Duration: 2050 2 $7M $0M $0M $0M $0M $1M
Duration: 2054 1 $5M $0M $0M $0M $2M $4M
Duration: 2055 5 $23M $4M $6M -$0M -$0M -$1M
Duration: 2056 3 $53M $0M $0M $39M $42M $42M
Duration: 2060 2 $4M $0M $0M -$4M -$2M -$3M
Duration: 2065 2 $6M $0M $1M -$1M -$1M -$1M
Duration: Long 1 $1M $0M -$0M $0M $0M -$0M

Top & Bottom 5 ETFs by 5-Day Flow

Invesco’s BulletShares 2029 Corporate Bond ETF (BSCT) topped the weekly inflow list with $79M, followed by PFIX at $49M despite its negative weekly performance. On the outflow side, the iShares iBonds Dec 2026 Term Corporate ETF (IBDR) saw the largest redemptions at -$180M, consistent with the broader 2026 duration bucket’s outflows, while the iShares iBonds Dec 2026 Term Treasury ETF (IBTG) shed -$41M as that maturity year nears completion.

Ticker Fund Name 5-Day Flow
Inflows
BSCT Invesco BulletShares 2029 Corporate Bond ETF $79M
PFIX Simplify Interest Rate Hedge ETF $49M
IBDU iShares iBonds Dec 2029 Term Corporate ETF $47M
IBTK iShares iBonds Dec 2030 Term Treasury ETF $42M
IBDV iShares iBonds Dec 2030 Term Corporate ETF $36M
Outflows
IBDR iShares iBonds Dec 2026 Term Corporate ETF -$180M
IBTG iShares iBonds Dec 2026 Term Treasury ETF -$41M
BSCQ Invesco BulletShares 2026 Corporate Bond ETF -$38M
IBTH iShares iBonds Dec 2027 Term Treasury ETF -$25M
IBHF iShares iBonds 2026 Term High Yield and Income ETF -$21M

Issuer League Table Update

iShares remains the dominant issuer in the channel with $44.02B in AUM and a 58.25% market share across 56 funds, followed by Invesco at $28.59B and 37.83% share across 36 funds; together these two issuers control roughly 96% of channel assets. Invesco led weekly inflows with $132M, outpacing iShares’ $75M, while Simplify rounded out the top three with $49M driven largely by PFIX flows. No issuer recorded a meaningful net outflow for the week, with KraneShares, American Beacon, and Global X all showing negligible flat activity.

Top 5 Issuers by AUM

Brand Fund Count AUM AUM Market Share
iShares 56 $44.02B 58.25%
Invesco 36 $28.59B 37.83%
State Street 24 $1.22B 1.62%
Vanguard 10 $548M 0.73%
FolioBeyond 1 $429M 0.57%

Top & Bottom 3 Issuers by 5-Day Flow

Brand 5-Day Flow
Inflows
Invesco $132M
iShares $75M
Simplify $49M
Outflows
KraneShares -$0M
American Beacon $0M
Global X $0M

For a deeper dive into these trends, access our FREE, in-depth FI: Specialty ETF reports in the right side panel of this page.

Disclosures

This material is for informational purposes only and should not be considered investment advice. All investments, including ETFs, involve risk, including the possible loss of principal. Investors should consider their investment objectives, risks, charges, and expenses carefully before investing.

This analysis was developed by the team at ETF Action. We leverage advanced AI tools to assist in the drafting and refinement of our content, based on our expert prompts, direction, and final review.