SeriesMagCorrOverlapThrough
These move opposite each other about 66% of the time
Strong inverse
Strong enough to use as a signal — read the stability and regime notes below before relying on it.
American Tower owns and operates about 150,000 wireless towers throughout the US, Asia, Latin America, Europe, and Africa. It also owns and/or operates 30 data centers in 11 US markets after acquiring CoreSite. The company's customer base in the tower business is very concentrated, with most revenue in each market generated by the top three or four mobile carriers. The company operates more than 40,000 towers in the US, which accounted for about half of total revenue in 2025. Outside the US, American Tower operates about 47,000 towers in Latin America (dominated by Brazil), 33,000 towers in Europe, and 28,000 towers in Africa. American Tower operates as a REIT.
Market cap 81.8B · 4,866 employees
Fed Funds Rate
FEDFUNDS
What to Watch
Drifting from pattern
Recent correlation (+12%) is running 1.6σ away from the long-run average of -82%.
Tighter in drawdowns
Pair moves more tightly when both fall (+43%) than when both rise (+10%) — typical risk-off behaviour.
Regime-dependent
The correlation has flipped sign across time windows — not reliable as a standalone signal.
Time Series
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: -18 to 18 months.
Selected shift
No shift
Correlation at this shift
-82%
No shift — both series at their actual dates.
60 overlapping points at this shift
Time series with Fed Funds Rate at original dates
Indexed to 100 at start
Deep Dive
Stability
How the correlation evolves over time. A stable line means the relationship is reliable; large swings signal regime-dependent behavior.
Corr
-82%
Pearson correlation
95% CI
-89% → -71%
Likely range
R²
67.0%
Variance explained
Trend agreement
65.6%
Same-direction moves
Significance
p < 0.001
Statistical confidence
Data points
60
Thin
Pipeline
Pipeline Summary
60 paired data points survived the monthly window.
Raw input
1,255
862
Normalized
1,255
862
Prepared
61
862
Aligned
60
60
Invalid removed
Explore
The strongest positive and inverse pairs we’ve saved for each side of this comparison — good jumping-off points if this result raised a question.
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
+10%
12 periods · Return correlation when both series rose
Both Falling
+43%
9 periods · Return correlation when both series fell
Diverging
-61%
38 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
803
A: 1 / B: 802
Series A
American Tower Corporation
AMT
Market cap 81.8B · 4,866 employees
Stock · 1,255 raw → 61 prepared
Series B
FEDFUNDS
FRED · 862 raw → 862 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
7
Estimated crossover points between normalized spreads.
Slope
-0.0485
Linear regression slope.
Intercept
13.9467
Linear regression intercept.
Saved 1 hour ago · ID: fred-fedfunds_stock-amt_5y