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

One of Bradley F. Cowan's methodologies for identifying cycles in financial markets and projecting future turning points employs synodic lunar periods (the time it takes the Moon to align with the Sun relative to the Earth). 

 

Major low in the S&P 500 (SPY/ES) on Monday, March 30 at 20:20 EDT (Hurst 20-week cycle low),

followed by one synodic lunar cycle projection (red arrow) extending to Thursday, April 30 at 09:04. 

 

While the synodic lunar month averages 29.53058886 days (≈ 29 days, 12 hours, 44 minutes, and 2.88 seconds), orbital eccentricity causes individual periods to vary from 29.26 to 29.80 days, a difference of up to 12 hours and 57 minutes. Cowan's technique anchors the start date and time of the synodic lunar cycle to a confirmed major market top or bottom, e.g. to the major low on Monday, March 30, 2026 at 20:20 EDT. Subsequent cycle projections are then generated at exact 360-degree intervals forward from that anchor to April 30 (Thu) 09:04, May 29 (Fri) 21:48, June 28 (Sun) 10:32, July 27 (Mon) 23:16, etc.

 

 
Anchored to the S&P's major low on Monday, March 30 at 20:20 EDT, the 1st, 2nd, 4th, and 8th harmonics

of one synodic lunar cycle generate the blue summation or composite projection line to April 30 (Thu) 09:04.

 

Anchored to the S&P's major low on Monday, March 30 at 20:20 EDT, the 1st, 2nd, 4th, and 8th harmonics of the

8.4-week cycle (2-lunar month or 59-day cycle) generate the blue composite projection line for April and May 2026.

 

 

 Anchored to the S&P's major low on Monday, March 30 at 20:20 EDT, the 1st, 2nd, 4th, and 8th harmonics of the

17-week cycle (= Intermediate Term Delta cycle = 4-lunar month or 118-day cycle = 1/3 of the lunar year)

generate the blue composite projection line to July 27 (Mon) 23:16. The June 19 high should

be lower than the May 9 high, and the July 27 low should be lower than the March 31 low.

 

Bradley Cowan's synodic lunar cycle projections in stocks.

 

In his books "Four Dimensional Stock Market Structures and Cycles" (1993) and "Pentagonal Time Cycle Theory" (2009), Cowan further elaborates on this "anchored" lunar and planetary cycle projection methodology. However, unlike the highs and lows shown in the blue composite projection lines in the charts above, Cowan's methodology utilizes 45-degree synodic lunar cycle offsets (= 8th harmonic ≈ 3.6913 calendar days or 3 days, 16 hours, 35 minutes, and 28.3 seconds = April 03 (Fri) 12:55, April 07 (Tue) 05:31, April 10 (Fri) 22:06, etc.) to project potential turning points only rather than specific highs and lows, higher highs and higher lows, and lower highs and lower lows. 

 

» The sidereal lunar cycle works nearly perfectly. «

 

In 2021, Mario of "4X Other Way" presented anchored projections of future turning points using the 27.321661-day sidereal lunar cycle (≈ 27 days, 7 hours, 43 minutes, and 11.5 seconds; the time it takes the Moon to orbit the Earth relative to the distant 'fixed' stellar background; to fixed stars such as Aldebaran, Altair, Deneb, Rigel, or Sirius). Now, should the lunar cycle be synodic or sidereal? Both cannot be simultaneously correct or exact—at best, only one of them works "perfectly."

 

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

See also:

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

4X Other Way (2021) - The Law of Vibration and Lunar Periodicity in Market Forecasting. (video) 

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.