iShares MBS ETF vs Vanguard Short Term Corporate Bond ETF — how do they compare? iShares MBS ETF trades at $89.52 (market cap $35.41B), while Vanguard Short Term Corporate Bond ETF trades at $77.29 (market cap $51.90B). The key difference: Vanguard Short Term Corporate Bond ETF is the larger of the two by market cap, and iShares MBS ETF is more actively traded (5,388,525 versus 2,892,221). Which is the better fit depends on your goals — on Pluang, investors hold iShares MBS ETF for 96 Days and Vanguard Short Term Corporate Bond ETF for 52 Days on average.
| MBB | VCSH | |
|---|---|---|
Market Cap | $35.41B | $51.90B |
Volume | 5,388,525 | 2,892,221 |
Sector | Fixed Income | Fixed Income |
52-Week High | $96.91 | $80.20 |
52-Week Low | $89.09 | $77.03 |
Typical Hold Time | 96 Days | 52 Days |
Signals from Pluang's Aura AI — not financial advice
MBB, the iShares MBS ETF, trades at $89.54, up 0.36% on the day but showing a bearish technical signal overall. The ETF has faced significant short interest growth of 98.3% in September 2026, reaching 6.57 million shares, and recently hit a 52-week low. Recent news highlights concerns over intermediate duration risk amid potential rate hikes, though institutional buying from firms like Corient Private Wealth and Baird Financial Group provides some support. Key technical indicators show oversold conditions on the 12-day RSI but strong selling pressure from moving averages.
The outlook for MBB remains cautious due to interest rate sensitivity and convexity risks in the mortgage-backed securities market. While dividend payments offer income, rising rates and inflation pressures pose downside risks. Analyst sentiment is neutral to bearish, with the ETF's performance heavily tied to Federal Reserve policy. Investors should weigh the high yield against duration risk in a tightening cycle.
VCSH, the Vanguard Short-Term Corporate Bond ETF, trades at $77.27 with a slight 0.08% daily gain. Technical indicators show a bearish trend from moving averages, though oscillators are neutral. The ETF offers a competitive yield and low expense ratio, but faces headwinds from tight credit spreads and a cautious market outlook. Recent news highlights its role as a stable income alternative to CDs or stable value funds, with institutional activity showing mixed positioning.
The outlook for VCSH is neutral with limited upside due to unattractive entry points and constrained credit spreads. Its short duration minimizes interest rate risk, but yield advantages over peers may narrow. Key risks include corporate credit deterioration and Fed policy shifts. Investors seeking short-term, high-quality bond exposure may find value, but current levels offer modest total return potential.
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The fund will invest at least 80% of its assets in the component securities of the underlying index and TBAs that have economic characteristics that are substantially identical to the economic characteristics of the component securities of the index, and the fund will invest at least 90% of its assets in fixed income securities included in the underlying index that advisor believes will help the fund track the index.
Read more on MBB →VCSH tracks the Bloomberg U.S. 1-5 Year Corporate Bond Index, focusing on high-quality, investment-grade debt with short maturities. It is designed to offer higher income than Treasury bills with significantly lower interest rate sensitivity than intermediate or long-term bond funds.
Read more on VCSH →