Capitalizing on the Reset: May Buffer Strategies Absorb $357M in Weekly Flows

Macro Summary & Product Growth

The Buffer (Defined Outcome) ETF landscape continues its formidable expansion, reflecting sustained advisor and investor demand for defined risk parameters. Total Assets Under Management have reached $91B across 490 individual ETFs from 19 unique issuers. Capital continues to steadily stream into the space; net flows over the past week added $293M, driving the Year-To-Date influx to $6.39B and pushing the impressive 1-Year trailing flow total to $12.93B.

Issuers are showing no signs of slowing down, rapidly flooding the market with new outcome variations to capture this momentum. Over the last three months alone, an incredible 38 new ETFs have launched in the buffer category. The influx of new entrants like Corgi, Aptus, and BufferLABS highlights a highly competitive, hyper-growth phase as providers seek to differentiate across asset classes, outcome periods, and buffer depths.

Performance (Idiosyncratic Returns)

Defined Outcome performance is highly idiosyncratic; it is driven fundamentally by a fund’s current proximity to its upside cap and downside buffer, rather than solely by the performance of the underlying asset class. That said, underlying market movements dictate the trajectory. This week, Equity: U.S. Small Cap – Blend led the way with a category-average 2.75% gain, followed closely by Equity: Thematic – Multi-Sector at 2.39%. Conversely, Digital Asset: Cryptocurrency – Bitcoin dragged at the bottom, falling -3.92%, alongside Commodity: Focused – Precious Metals which dropped -1.06%.

Because investor returns are entirely dependent on their precise entry point within a specific ETF’s outcome period, macro-level category averages only reveal part of the story. We highly recommend evaluating individual fund metrics against their specific real-time cap and buffer levels. Dive into the full, free performance report in the right-side panel to see exact return profiles, historical risk-adjusted metrics, and leaderboards across all underlying categories.

Flow Cyclicality & Trends

Flows within the defined outcome ecosystem are currently exhibiting their typical cyclicality, with capital heavily concentrated around the current and upcoming reset periods. Investors are actively rolling assets into the “May” series funds to maximize fresh caps and full buffer protection. Unsurprisingly, Equity strategies completely dominate total asset gathering. The single largest individual flow magnet this week was the Innovator Equity Managed Floor ETF (SFLR), which pulled in a massive $224M.

Flows by Asset Class

Flows by Outcome Period / Strategy

Individual Fund Flows (WTD)

League Tables

The competitive landscape remains top-heavy, dominated primarily by the early pioneers of the defined outcome space. FT Vest holds the crown as the largest issuer with $44.61B in AUM (representing a commanding 49.04% market share), closely followed by Innovator at $33.30B (36.61% market share). Both giants continue to secure the lion’s share of new capital, with FT Vest and Innovator capturing $152M and $136M in weekly inflows, respectively, further cementing their dominance over the rest of the pack.

Top 5 Issuers by AUM

Issuer Flows (WTD)