iShares MBS ETF (MBB) Price, Holdings, & News

ETF Overview

iShares MBS ETF (the Fund), formerly iShares Barclays MBS Bond Fund, is an exchange-traded fund (ETF). The Fund seeks investment results, which correspond to the price and yield performance of the Barclays Capital U.S. MBS Index (the Index). The Index measures the performance of investment grade mortgage-backed pass-through securities issued by the Government National Mortgage (GNMA). The Index measures the performance of investment grade mortgage-backed pass-through securities issued by the Government National Mortgage Association (GNMA), Federal National Mortgage Association (FNMA) and Federal Home Loan Mortgage Corporation (FHLMC). The Fund invests in a representative sample of securities included in the Index, which has an investment profile similar to the Index. The investment advisor of the Fund is BlackRock Fund Advisors (BFA).

Key Stats

• Today's Range: $93.24 to $93.43
• 50-Day Range: $91.41 to $93.90
• 52-Week Range: $90.28 to $96.76
• Volume: 2.62 million shs
• Average Volume: 2.75 million shs
• Market Capitalization: $36.86 billion
• Assets Under Management: $39.17 billion
• Dividend Yield: 4.06%
• Net Expense Ratio: 0.04%
• Aggregate Rating: N/A

MBB ETF - Frequently Asked Questions

How have MBB shares performed this year?

iShares MBS ETF's stock was trading at $91.68 at the beginning of 2025. Since then, MBB stock has increased by 1.9% and is now trading at $93.42.
View the best growth stocks for 2025 here.

Who are iShares MBS ETF's major shareholders?

Top institutional investors of iShares MBS ETF include Confluence Investment Management LLC (0.07%), Bush Investment Group LLC and Private Client Services LLC.

How do I buy shares of iShares MBS ETF?

Shares of MBB stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services.

What other stocks do shareholders of iShares MBS ETF own?

Based on aggregate information from My MarketBeat watchlists, some other companies that iShares MBS ETF investors own include Meta Platforms (META), Walt Disney (DIS), Intel (INTC), iShares iBoxx $ Investment Grade Corporate Bond ETF (LQD), Mastercard (MA), Cisco Systems (CSCO) and iShares iBoxx $ High Yield Corporate Bond ETF (HYG).

Fund Details

• Issuer: iShares
• Fund Name: iShares MBS ETF
• Tax Classification: Regulated Investment Company
• Stock Exchange: NASDAQ
• Current Symbol: NASDAQ:MBB
• Inception Date: 3/13/2007
• Fund Manager: James Mauro, Scott Radell
• Web: www.iShares.com
• Phone: +1-800-4742737

Fund Focus

• Asset Class: Fixed Income
• Benchmark: Bloomberg U.S. MBS Index
• Category: U.S. Government
• Focus: Agency MBS
• Development Level: Developed Markets
• Region: North America
• Number of Holdings: 11339

Fund Statistics

• Assets Under Management: $39.17 billion
• Average Daily Volume: $2.62 million
• Discount/Premium: 0.00%

Administrator, Advisor and Custodian

• Administrator: State Street Bank and Trust Company
• Advisor: BlackRock Fund Advisors
• Custodian: State Street Bank and Trust Company
• Distributor: BlackRock Investments, LLC
• Transfer Agent: State Street Bank and Trust Company
• Trustee: N/A
• Lead Market Maker: Jane Street

Options

• Optionable: Optionable
• Options Volume: 56
• Put Options: 8
• Call Options: 48
• Short Interest: 7,630,000 shs

Miscellaneous

• Outstanding Shares: 394,600,000
• Beta: 0.11
• Creation Unit: 100,000
• Creation Fee: $300.00