BLK vs MS: Correlation
Measured on weekly returns over the past three years, BlackRock (BLK) and Morgan Stanley (MS) carry a correlation of 0.69, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BLK and MS?
On 3 years of weekly data the BLK/MS correlation comes out at 0.69, strong. Lately the two have drifted apart, with the 1-year correlation at 0.58 versus 0.69 over 3 years. The 5-year figure is 0.68, and annualized covariance runs at 480.0 %².
Within BLK's tracked universe of 42 assets, MS comes in at #8 by 3-year correlation. Correlation aside, the last 12 months split them widely, with MS ahead by 41.8 points (+5.3% versus +47.1%). The rolling one-year correlation stayed in a tight band between 0.55 and 0.79 over the past three years, which points to a structural rather than episodic relationship.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
BLK vs MS: side by side
| BLK (BlackRock) | MS (Morgan Stanley) | |
|---|---|---|
| 1-year return | +5.3% | +47.1% |
| 5-year return | +38.9% | +142.0% |
| Volatility (ann.) | 24.7% | 28.3% |
| Beta vs S&P 500 | 1.19 | 1.43 |
| Max drawdown (3Y) | -23.7% | -29.2% |
| Market cap | $189.7B | $337.5B |
| P/E (trailing) | 28.1 | 17.4 |
| Dividend yield | 1.86% | 1.94% |
| Sector / category | Financials | Financials |
Year-by-year returns
| Year | BLK | MS |
|---|---|---|
| 2022 | -20.4% | -10.3% |
| 2023 | +17.9% | +13.9% |
| 2024 | +29.3% | +39.7% |
| 2025 | +6.6% | +45.2% |
| 2026 | +10.3% | +23.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BLK and MS good diversifiers for each other?
Somewhat, no more. With 0.69 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between BLK and MS?
As of 2026-08-27, the correlation of weekly returns between BLK and MS is 0.69 over 3 years, 0.58 over 1 year and 0.68 over 5 years.
Is MS a good diversifier for BLK?
Somewhat, no more. With 0.69 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.69 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/blk-vs-ms.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/blk-vs-ms/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BLK correlations · MS correlations
