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Comcast Corp. (CMCSA) vs Interest on Reserve Balances
Correlation
of % moves
-10%
In sync
of periods
41%
History
daysdays · through 2026-05-11
1,201
These move opposite each other about 41% of the time
Their swing sizes only faintly mirror each other (~1% of the pattern is shared).
A real but noisy link — useful as context, risky as a standalone signal.
On a log scale so equal % moves take equal vertical space — best when one series has grown much faster than the other.
What to Watch
Mostly stable
The relationship drifts a little but stays in the same neighbourhood.
Advanced
Statistics
In sync(i)
41.2%
Headline metric
Movement correlation(i)
-10%
Based on % moves
95% CI
-15% → -4%
Pipeline
Pipeline Summary
1,201 paired data points survived the daily window.
Raw input
1,255
1,748
Normalized
1,255
1,748
Prepared
1,255
1,748
Aligned
1,201
1,201
Invalid removed
Likely range of correlation
R²(i)
1.0%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
1,201
Deep
Time-Shifted Correlation
See how correlation changes when one series is offset in time. A taller bar at a non-zero shift means the two move together better when one leads the other — that's a potential lead/lag signal.
Correlation by shift
Click a bar to inspect. Range: -6 to 6 days.
Selected shift
No shift
Correlation at this shift
-10%
No shift — both series at their actual dates.
1,200 overlapping points at this shift
Baseline
-10%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-10%
A non-zero peak suggests one series lines up better when shifted against the other.
Stability
How the correlation evolves over time. A stable line means the relationship is reliable; large swings signal regime-dependent behavior.
Do They Crash Together?
How these series behave when markets are rising, falling, or diverging. A correlation that holds in drawdowns is very different from one that only works in rallies.
Both Rising
N/A
4 periods · Return correlation when both series rose
Both Falling
N/A
4 periods · Return correlation when both series fell
Diverging
-31%
241 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
601
A: 54 / B: 547
Series A
CMCSA
Stock · 1,255 raw → 1,255 prepared
Series B
Interest on Reserve Balances
IORB
FRED · 1,748 raw → 1,748 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
37
Estimated crossover points between normalized spreads.
Slope
-0.2479
Linear regression slope.
Intercept
0.0025
Linear regression intercept.
Saved 2 days ago · ID: fred-iorb_stock-cmcsa_daily_5y