Fuel Data Lab

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Fuel price signals and analytics

Fuel Stress Score

76

Elevated stress. Market conditions warrant caution.

Higher than 82% of historical weeks

Diesel prices are volatile but directionless, at historically high levels, highly synchronized nationwide.

U.S. No 2 Diesel Retail Prices • Monday, October 5, 2026

Elevated stress suggests increased market uncertainty; consider scenario planning.

Since last week:
VolatilityRegimeChangedCoherenceSurpriseLow
Price History (10 Years)
rising
falling
volatile
shocked
mean reverting

Market State

Regime

volatile

15 weeks in regime

Shape

linear trend up

87% confident

Coherence

100%

Regions moving in lockstep

Strong upward trend detected (R²=87%); prices rising 12.67¢/week.

Position vs History

Percentile (10y)

99%

Historically expensive

Z-Score (5y)

+2.61

Outside normal

Time Above $4.00

47%

Currently above threshold

Recent Motion

Spot Price

$6.199

1W Change

-0.183

4W Change

+0.232

Volatility (12w)

0.1435

Historical Analogs

In 3 similar historical periods, prices stayed flat in the following month, averaging -8¢ over 12 weeks.

Current stress is approaching peak levels seen in historical data.

Jan 2011 → Mar 2011

Prices rose significantly

87% match

+17¢ / 4w

Feb 2006 → May 2006

Prices remained stable

84% match

-0¢ / 4w

Aug 2018 → Oct 2018

Prices fell significantly

84% match

-9¢ / 4w

Advanced Analytics

Forward Distribution

Given this regime, historically...

In volatile + high coherence regimes (n=3):

4 weeks

33%

lower

8 weeks

—

Est.

12 weeks

67%

higher

Median change (4w)-0¢
10% worst case (4w)-9¢
10% best case (4w)+17¢

Historically favorable. In similar conditions, prices more often fell than rose over the following month.

Why This Happened

This week's decline is most consistent with possible price spike detected, possible unexpected move, and possible unstable regime.

Price spike detectedmedium

Significant upward price movement detected (0.2σ)

Unexpected movemedium

Price moved 2.1σ from expected, indicating market surprise

Unstable regimemedium

Market in volatile regime, prices less predictable

Historical highhigh

Price at 99th percentile vs 10-year history

Regime Stability

Stability Score

52%

Transition Risk

moderate
Current:Volatile
15w
85%
High historical break rate−70
Long regime duration+60
High regime confidence+50

Regime is moderately stable but showing some stress signals. Monitor for changes.

Threshold Heatmap
Current Price$6.199
$5.00$5 resistanceCurrent Zone
22% time above+120¢ above
$4.50High
33% time above+170¢ above
$4.00Elevated
47% time above+220¢ above
$3.50Moderate
96% time above+270¢ above
$3.00Normal
100% time above+320¢ above
$2.50Low
100% time above+370¢ above
Rarely above
Sometimes
Often above
Regional Divergence Radar
Most Likely to Decouple

West Coast

+103¢ vs national

Spread Tension73%

Regions are moving in sync. No significant divergence signals.

Multi-Fuel Correlation

30-Day Correlation

100%

Strength

strong

Diesel

-18.3¢

Volatile

Gasoline

-11.1¢

Rising

Both fuels moving in sync. National or international factors likely driving prices.

Seasonal Trends

Data Range

11 yrs

2016–2026

Typical High

Sep

$3.83 avg

Typical Low

Dec

$3.33 avg

vs Seasonal Avg

+63.6%

Week 41

Diesel prices typically peak around Sep ($3.83) and bottom in Dec ($3.33). Current price is 63.6% above the seasonal average for week 41.

Signal Stability

Signals are internally consistent.

Signal Confidence
Regime85%
Shape87%
SurpriseLOW
CoherenceHIGH
Recent Events
↑ Price SpikeLOW

Notable upward price movement

Elevated volatility detected

Sep 21

0.2σ

σ = standard deviations from expected weekly change

Regional Sync

100%

Top 10% of historical weeks