Fund Evaluator:
BlackRock Core Bond K (CCBBX)
Follow This Fund
Best Performing in Intermediate Core Bond Over the Last Year
| 4.5% | Aristotle Pacific EXclusive Series I (APXIX) |
| 4.0% | MML Barings Core Bond M1 (MMCDX) |
| 3.9% | MML Barings Core Bond M2 (MMCAX) |
| 3.2% | Nuveen Core and Impact Bond I (TSBHX) |
| 3.1% | American Beacon DoubleLine Sel Inc Inv (BILTX) |
Fund Details
BlackRock Core Bond K Overview
BlackRock Core Bond K (CCBBX) is an actively managed Taxable Bond Intermediate Core Bond fund. BlackRock launched the fund in 1997.
The investment seeks to realize a total return that exceeds that of the Bloomberg Barclays U.S. Aggregate Bond Index. The fund normally invests at least 80% of its assets in bonds and maintains an average portfolio duration that is within ±20% of the duration of the benchmark. The management team selects bonds from several sectors including: U.S. treasuries and agency securities, commercial and residential mortgage-backed securities, CMOs, asset-backed securities and corporate bonds. The fund may invest up to 25% of its assets in assets of foreign issuers, of which 10% (as a percentage of the fund's assets) may be invested in emerging markets issuers.
About BlackRock Core Bond K (CCBBX)
There are 5 members of the management team with an average tenure of 4.47 years: Rick Rieder (2010), Siddharth Mehta (2025), Russell Brownback (2025), Chi Chen (2022), Sam Summers (2025). Management tenure is more important for actively managed funds than passive index funds.
The fund has 1 primary benchmark: Bloomberg US Agg Bond TR USD index with a weighting of 100%. BlackRock Core Bond K has 4179 securities in its portfolio. The top 10 holdings constitute 28.7% of the fund’s assets. The fund meets the SEC requirement of being classified as a diversified fund. The fund is not considered to have an ESG focus with its investment selection and management.
BlackRock Core Bond K is part of the Fixed Income global asset class and is within the Taxable Bond fund group. BlackRock Core Bond K has 8.2% of its portfolio invested in foreign issues. The overall assets allocated to domestic stock is 0.5%. There is 0.0% allocated to foreign stock, and 0.0% is allocated to preferred stocks. The bond allocation as a percentage of total assets is 142.3% (134.1% domestic bond, 8.2% foreign bond and 0.0% convertible bond). BlackRock Core Bond K has -57.8% of the portfolio in cash.
Assets Under Management
The fund has $797 million in total assets, which is below the $3 billion average for the Intermediate Core Bond category. Normally, lower assets under management translates to higher average expense ratios, and greater total assets are desired. However, for some investment categories, such as small-cap investing, it may be difficult for the manager to fully employ the desired active strategy if assets grow too large or too quickly.
CCBBX Performance and Fees
The expense ratio measures how much of a fund’s assets are used for administrative expenses and operating expenses, including adviser fees and fees for the transfer agent and custodial services. The BlackRock Core Bond K expense ratio is below average compared to funds in the Intermediate Core Bond category. BlackRock Core Bond K has an expense ratio of 0.39%, which is 31% lower than its category average, making the fund expense ratio grade a B. While it is difficult to predict returns, it is known that high annual expense ratios reduce your rate of return, and excessive fees are difficult to overcome. Active management normally comes with higher expense ratios than passive index management. Certain investment categories such as small company and foreign also normally have higher expense ratios. It is best to compare fund expense ratios against the category averages for meaningful assessments.
High portfolio turnover can translate to higher expenses and lower aftertax returns. BlackRock Core Bond K has a portfolio turnover rate of 412%, indicating that holds its assets around 0.0 years. By way of comparison, the average portfolio turnover is 151% for the Intermediate Core Bond category.
Recently, in the month of July 2026, BlackRock Core Bond K returned -1.3%, which earned it a grade of C, as the Intermediate Core Bond category had an average return of -1.3%. The letter grades of A, B, C, D and F are based upon relative rankings within the investment category. A grade of A, for example, would indicate that the return is in the highest 20% for that time period compared to all funds in that category.
BlackRock Core Bond K has a trailing yield of 4.41%, which is above the 4.04% category average. The fund normally distributes its income monthly and its capital gains annually.
It’s natural to seek the best-performing investments, but you must consider the relationship between risk and return and the impact of costs and taxes on your realized returns.
BlackRock Core Bond K Grades
Year to date, the fund has returned -0.7%, 0.1 percentage points better than the category, which translates into a grade of C. The fund has returned 2.6% over the past year (grade of B), 3.6% over the past three years (grade of D) and -0.5% per year over the past five years (grade of C) and 1.5% per year over the past 10 years (grade of C).
For more mutual fund grades, analysis and screening tools to help your investment discovery, join AAII for a $2, full-access trial. Learn more here: https://invest.aaii.com/membership.
Otherwise, for more information about BlackRock Core Bond K, including its riskiness, submit your email to unlock the rest of the article.
Gain access to exclusive AAII member-only content.
CCBBX Trailing NAV Total Returns Data as of 7/31/26
| Last Month |
Last Quarter |
Ann'l. 1Yr |
Ann'l. 3Yr |
Ann'l. 5Yr |
Ann'l. 10Yr |
|
| CCBBX Return (NAV) | -1.3% | -0.8% | 2.6% | 3.6% | -0.5% | 1.5% |
| CCBBX Grade | C | C | B | D | C | C |
| +/- Category | -0.0% | 0.0% | 0.1% | -0.1% | -0.0% | 0.1% |
| Intermediate Core Bond Avg | -1.3% | -0.8% | 2.5% | 3.7% | -0.5% | 1.4% |
| CCBBX Tax Cost Ratio | na | na | 1.8% | 1.7% | 1.5% | 1.4% |
CCBBX Annual NAV Total ReturnsData as of 7/31/26
| 2026 | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | |
| CCBBX Return (NAV) | -0.7% | 7.4% | 1.3% | 5.9% | -13.8% | -1.3% | 8.3% | 9.8% | -0.4% | 3.2% | 2.8% |
| CCBBX Grade | C | B | D | B | D | B | B | A | C | D | C |
| +/- Category | 0.1% | 0.3% | -0.3% | 0.2% | -0.6% | 0.1% | 0.2% | 1.4% | 0.0% | -0.4% | -0.0% |
| Intermediate Core Bond Avg | -0.7% | 7.0% | 1.6% | 5.6% | -13.2% | -1.5% | 8.1% | 8.5% | -0.4% | 3.6% | 2.8% |
| Risk Measures | |
| Standard Deviation: | 5.8% |
| Total Risk Index: | 0.47 - Below Average |
| Category Risk Index: | 1.04 - High |
| Category Risk Grade: | F (82% Rank) |
| Beta: | 1.03 |
| R-Squared: | 99% |
| Leveraged Fund: | No |
| Inverse Fund: | No |
| Portfolio Characteristics | |
| Equity Investment Style: | na |
| Bond Investment Style: | na |
| Yield: | 4.4% |
| Dividend Distribution: | Monthly |
| Cap Gains Distribution: | Annually |
| Total Assets: | $3351 Mil |
| Fund Total Assets: | $ 798 Mil |
| Share Class Type: | Other |
| Portfolio Turnover: | 412% |
Management Team
| Number of Managers: 5 | |||
| Longest Tenure: 16.0 years | |||
| Average Tenure: 4.5 years | |||
| Managers (Year): Rieder Rick (2010), Chen Chi (2022), Summers Sam (2025), Mehta Siddharth (2025), Brownback Russell (2025) | |||
Portfolio Composition (as of 5/31/26)
| # of Holdings: | 4179 |
| % in Top 10 Holdings: | 28.7% |
| Fund is Non-Diversified: | No |
| % in Foreign Issues: | 8.2% |
Portfolio Allocation |
|
| Domestic Stock: | 0.5% |
| Foreign Stock: | 0.0% |
| Preferred Stock: | 0.0% |
| Domestic Bond: | 134.1% |
| Foreign Bond: | 8.2% |
| Convertible Bond: | 0.0% |
| Other: | 15.0% |
| Cash: | -57.8% |
Purchase Information
| Fund Family: | BlackRock |
| Phone Number: | 800-537-4942 |
| Website: | http://www.blackrock.com |
| Status: | Open |
| Inception Date: | May 1, 1997 |
| Min. Initial Purchase: | $5,000,000 |
| Min. Initial IRA Purchase: | $ 0 |
| True No-Load: | Yes |
| Front Load Maximum: | 0.00% |
| Deferred Charge Maximum: | 0.00% |
| Redemption Charge Maximum: | 0.00% |
| 12b-1 Fee: | na |
Expenses and Fees | |
| Expense Ratio (%): | 0.39% ( Rating : Below Avg ) |
| Category Average Expense Ratio (%): | 0.57% |
| Share Class: | BlackRock Core Bond Instl |
| Min. Subsequent Purchase: | $ 0 |
| Min. Subsequent IRA Purchase: | $ 0 |
