Key Takeaways
- • Morningstar upgraded iShares MSCI USA Momentum Factor ETF (MTUM) to Silver Medalist Rating from Bronze, citing increased confidence in its Process Pillar rating elevated to Above Average from Average.
- • MTUM tracks the MSCI USA Momentum SR Variant Index, which ranks stocks using seven- and 13-month returns adjusted for three-year volatility, with quarterly rebalancing and a 5% absolute weight cap per holding to manage momentum exposure systematically.
- • BlackRock's operational infrastructure—including automated index tracking, experienced portfolio management, global trading desk execution, and independent risk monitoring—earned Above Average ratings across Process, People, and Parent pillars.
- • Morningstar simultaneously upgraded iShares Russell 3000 ETF (IWV) to Silver Medalist Rating from Bronze, with Process Pillar elevated to High from Above Average, reflecting enhanced confidence in broad US equity market capture.
Summary
Morningstar has elevated its confidence in two iShares ETFs managed by BlackRock, awarding both Silver Medalist Ratings in March 2026. The primary upgrade centers on iShares MSCI USA Momentum Factor ETF (MTUM), which received a Process Pillar upgrade to Above Average from Average. This advancement reflected Morningstar's increased conviction in the fund's ability to execute its momentum-focused investment strategy consistently.
MTUM tracks the MSCI USA Momentum SR Variant Index, which employs a quantitative methodology designed to isolate stocks exhibiting stable, risk-adjusted momentum. The index calculates momentum scores by averaging seven- and 13-month historical returns, each adjusted for three-year volatility to emphasize consistency and reduce cyclical exposure. The strategy selects constituents with the highest risk-adjusted momentum scores up to a fixed count and applies turnover buffers to minimize transaction costs. Holdings are weighted by both momentum and market capitalization, with an absolute weight cap of 5% per position. Quarterly rebalancing rotates up to 30% of the portfolio or until all holdings demonstrate stronger momentum than remaining candidates. During periods of extreme market volatility, the index can execute special rebalances using only the seven-month momentum metric to enable faster adjustment to market regime changes.
BlackRock's operational capabilities underpinned all three pillar upgrades for MTUM. The firm combines automated index tracking with human oversight, deploying experienced portfolio managers to handle index changes, corporate actions, and trade approvals. BlackRock's global trading desk provides cost-efficient local execution, while an independent risk committee monitors tracking error to maintain performance within established tolerances. These operational strengths earned Above Average ratings in both the People and Parent pillars.
Simultaneously, Morningstar upgraded iShares Russell 3000 ETF (IWV) to Silver Medalist Rating from Bronze. The upgrade reflected enhanced confidence in IWV's ability to capture broad US equity market returns, with its Process Pillar elevated to High from Above Average. This second upgrade reinforces Morningstar's positive reassessment of BlackRock's iShares platform execution quality across multiple index-tracking strategies during the current market environment.
MTUM tracks the MSCI USA Momentum SR Variant Index, which employs a quantitative methodology designed to isolate stocks exhibiting stable, risk-adjusted momentum. The index calculates momentum scores by averaging seven- and 13-month historical returns, each adjusted for three-year volatility to emphasize consistency and reduce cyclical exposure. The strategy selects constituents with the highest risk-adjusted momentum scores up to a fixed count and applies turnover buffers to minimize transaction costs. Holdings are weighted by both momentum and market capitalization, with an absolute weight cap of 5% per position. Quarterly rebalancing rotates up to 30% of the portfolio or until all holdings demonstrate stronger momentum than remaining candidates. During periods of extreme market volatility, the index can execute special rebalances using only the seven-month momentum metric to enable faster adjustment to market regime changes.
BlackRock's operational capabilities underpinned all three pillar upgrades for MTUM. The firm combines automated index tracking with human oversight, deploying experienced portfolio managers to handle index changes, corporate actions, and trade approvals. BlackRock's global trading desk provides cost-efficient local execution, while an independent risk committee monitors tracking error to maintain performance within established tolerances. These operational strengths earned Above Average ratings in both the People and Parent pillars.
Simultaneously, Morningstar upgraded iShares Russell 3000 ETF (IWV) to Silver Medalist Rating from Bronze. The upgrade reflected enhanced confidence in IWV's ability to capture broad US equity market returns, with its Process Pillar elevated to High from Above Average. This second upgrade reinforces Morningstar's positive reassessment of BlackRock's iShares platform execution quality across multiple index-tracking strategies during the current market environment.
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