Bradley Cowan’s Lunar Cycle Projection Methodology Applied to the S&P 500

Bradley F. Cowan's methodology for identifying lunar cycles in financial markets employs geocentric synodic lunar cycles (see video below). While the synodic month averages 29.53058886 days (360°), orbital eccentricity causes individual periods to vary from 29.26 to 29.80 days, a difference of up to 12 hours and 57 minutes.

 

 

 
Anchored to the S&P 500's major low on Monday, March 30 at 20:00, the current Lunar

Cycle generates the blue summation or composite line projection for April shown above.

 

Cowan's technique anchors the lunar cycle start date to a confirmed major market top or bottom. Subsequent cycle projections are then generated at exact 360-degree intervals forward from that anchor. 

 

 The blue summation lines show the projected peaks and troughs for

the forthcoming 2-lunar month and 4-lunar month cycles in the S&P 500. 

Bradley Cowan's Lunar Cycle in Stocks.

 

Unlike the blue summation line charts above, Cowan’s methodology utilizes a 45° lunar offset (≈3.6913 calendar days or 3 days, 16 hours, and 35 minutes) to identify recurring tradable turning points. 

 

Reference:
Stock Market Geometry (2022) - Bradley Cowan's Lunar Cycle in Stocks. (video)

See also:

Bradley F. Cowan (2009) - Pentagonal Time Cycle Theory. 

Bradley F. Cowan (2003) - 3-Step Guide to Market Timing via Astro Cycles. 

Bradley F. Cowan (1993) - Four Dimensional Stock Market Structures and Cycles. Volumes I & II.  

David F. (2021) - Underlying Trend: Sigma-L.
TPR (2012) - The Delta Phenomenon.

TPR (March 19, 2026) - 20-Week Cycle Low in the S&P 500 and US Stock Indexes. 

Jeffrey A. Hirsch (March 25, 2026) - April Stock Market Performance in Midterm Election Years.

Nicholas D. Savino (April 4, 2026) - April 2026 S&P 500 Forecast.