CMCSA vs JL: Correlation
Comcast (CMCSA) and J-Long Group Limited - Class A (JL) show a negative relationship: their 3-year correlation of weekly returns is -0.21.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CMCSA and JL?
On 3 years of weekly data the CMCSA/JL correlation comes out at -0.21, negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.18 over 1 year against -0.21 over 3. The 5-year figure is n/a, and annualized covariance runs at -2843.0 %².
Within CMCSA's tracked universe of 39 assets, JL comes in at #33 by 3-year correlation. Twelve-month performance is nearly a tie, at -12.6% for CMCSA and -16.4% for JL. Risk is not evenly split, since JL carries 24.4 times the volatility of the other side.
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.
CMCSA vs JL: side by side
| CMCSA (Comcast) | JL (J-Long Group Limited - Class A) | |
|---|---|---|
| 1-year return | -12.6% | -16.4% |
| 5-year return | -44.5% | n/a |
| Volatility (ann.) | 23.8% | 580.0% |
| Beta vs S&P 500 | 0.48 | -1.02 |
| Max drawdown (3Y) | -44.9% | -98.6% |
| Market cap | $93.7B | – |
| P/E (trailing) | 8.7 | 6.5 |
| Dividend yield | 4.85% | 0.00% |
| Sector / category | Communication Services | US Listed |
Year-by-year returns
| Year | CMCSA | JL |
|---|---|---|
| 2022 | -28.7% | – |
| 2023 | +29.1% | – |
| 2024 | -11.8% | – |
| 2025 | -17.3% | +67.1% |
| 2026 | -2.2% | -20.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CMCSA and JL good diversifiers for each other?
Yes. With a correlation of -0.21, CMCSA and JL have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between CMCSA and JL?
As of 2026-08-27, the correlation of weekly returns between CMCSA and JL is -0.21 over 3 years, -0.18 over 1 year and n/a over 5 years.
Is JL a good diversifier for CMCSA?
Yes. With a correlation of -0.21, CMCSA and JL have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.21 mean?
On the −1 to +1 scale, -0.21 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/cmcsa-vs-jl.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cmcsa-vs-jl/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CMCSA correlations · JL correlations
