Compare iShares MBS ETF (MBB) vs Vanguard Mega Cap Growth ETF (MGK) Price & Performance
Price performance (Past 24H)
Key statistics
Key statistics
iShares MBS ETF vs Vanguard Mega Cap Growth ETF — how do they compare? iShares MBS ETF trades at $89.79 (market cap $35.41B), while Vanguard Mega Cap Growth ETF trades at $94.42 (market cap $33.70B). The key difference: iShares MBS ETF and Vanguard Mega Cap Growth ETF are close in size by market cap, and Vanguard Mega Cap Growth ETF is trading nearer its 52-week high, iShares MBS ETF nearer its low. Which is the better fit depends on your goals — on Pluang, investors hold iShares MBS ETF for 96 Days and Vanguard Mega Cap Growth ETF for 45 Days on average.
| MBB | MGK | |
|---|---|---|
Market Cap | $35.41B | $33.70B |
Volume | 5,388,525 | 1,362,010 |
Sector | Fixed Income | Broad Market / Factor |
52-Week High | $96.91 | $95.11 |
52-Week Low | $89.09 | $70.70 |
Typical Hold Time | 96 Days | 45 Days |
Aura AI Summary
Signals from Pluang's Aura AI — not financial advice
Aura AI Summary
Signals from Pluang's Aura AI — not financial advice
MBB, the iShares MBS ETF, trades at $89.73, up 0.57% on the day, but technical indicators signal a bearish trend with moving averages and ADX pointing lower. The ETF recently hit a 52-week low amid rising short interest, which surged 98.3% in September 2026 (Defense World, 2026-09-29). Despite this, institutional investors like Corient Private Wealth and Baird Financial have increased their stakes, and Norway's sovereign wealth fund is rotating into mortgage-backed securities (ETF Trends, 2026-09-04).
The outlook for MBB is cautious due to interest rate sensitivity and convexity risks from its 5.68-year duration, with Seeking Alpha highlighting downside potential if the Fed hikes rates (2026-09-19). However, its high-quality MBS portfolio offers income appeal, with recent dividends paid. Risks include persistent inflation and prepayment volatility, but institutional accumulation suggests long-term confidence.
MGK, the Vanguard Morningstar Mega Cap Growth ETF, trades at $94.42, down 0.53% on the day, with a bullish technical signal from moving averages and neutral oscillators. The ETF provides exposure to large-cap U.S. growth stocks like Nvidia and Apple, with a low expense ratio of 0.05% (Vanguard, 2026-07-18). Recent news highlights its strong five-year returns and suitability for long-term growth investors.
The outlook for MGK is positive, driven by its concentrated mega-cap growth holdings and cost efficiency, though risks include tech sector volatility and market concentration. Analyst sentiment is favorable, emphasizing its role in growth portfolios for investors seeking higher returns with manageable risk.
Returns comparison
Trailing returns across standard periods
Returns comparison
Trailing returns across standard periods
About iShares MBS ETF
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 →About Vanguard Mega Cap Growth ETF
MGK is an ETF that seeks to track the performance of the CRSP US Mega Cap Growth Index. It provides a low-cost, diversified exposure to the largest growth companies in the U.S. stock market. The fund is composed of mega-cap stocks that exhibit key growth factors, including high expected long-term earnings growth, high historical sales and earnings growth, and high return on assets. MGK is typically used by investors seeking long-term capital appreciation from market-leading firms.
Read more on MGK →
