Sep 18, 2026, 12:40 PMFixed Income
Harley Bassman Warns Flattening Yield Curve Could Hit Mortgage Bonds
Harley Bassman says a flattening Treasury yield curve threatens mortgage-backed securities, with possible spillovers to the broader market. Details remain limited.
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Summary
MarketWatch’s September 18, 2026 feed summary says Harley Bassman views a flattening Treasury yield curve as part of the problem facing mortgage-backed securities. The headline says mortgage bonds are set to deteriorate and could affect the broader market.
The source provided no supporting figures, time horizon, affected issuers, market-performance data, or additional causes. The available extract therefore does not establish the expected severity, timing, or transmission of any deterioration.
Positives
- Harley Bassman identifies the flattening Treasury yield curve as a specific indicator for investors monitoring mortgage-backed securities.
- The warning names mortgage-backed securities as the affected asset class rather than making an unspecified fixed-income claim.
- MarketWatch attributes the assessment directly to Harley Bassman, clearly identifying the source of the market warning.
Risks & concerns
- Mortgage-backed securities are expected to deteriorate, according to the MarketWatch headline summarizing Harley Bassman’s view.
- A flattening Treasury yield curve is cited as part of the pressure on mortgage bonds.
- Possible spillovers could reach the broader market, although the limited extract provides no expected magnitude or timing.
Primary sourceMarketWatch.com - Top Storieshttps://www.marketwatch.com/story/why-mortgage-bonds-are-set-to-deteriorate-and-possibly-hit-the-whole-market-according-to-this-wall-street-expert-0dd7f05d?mod=mw_rss_topstories
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