SPX vs Lunar Node's Speed

Market CITs are likely when the Lunar Node's Speed (degrees longitude/day) is at MIN/MAX and at 0.
The Eclipse Crash Window opens and closes around 21 days before and 21 days after the Solar- and Lunar Eclipses.
The table at left shows the nodal speed at MIN/MAX and at 0 during the next 30 days.
The Sun will conjunct the Lunar Node (North Node) on Sep 24 (Thu).
See also HERE + HERE

SPX vs the Rhythm of the Node

Financial markets correlate with the 4-14 day cycle of the retrograde-stationary-direct motion of the Lunar True Node (North Node). This cycle can be depicted by charting the geocentric longitude and speed of the Node against e.g. the S&P 500 (speed in this context is geocentric motion of degrees longitude per day). About every 86.5 days a so called Moon Wobble occurs when the Sun is conjunct, opposite and square (0°, 90°, 180°, 270°) the Lunar Node. The Node starts wobbling about two weeks before the exact event and remains instable until about one week after. If coupled with solar and lunar eclipses, the wobble-effect can be extended. And as the Sun approaches conjunction and opposition towards the lunar node, it's motion is almost blocked (bluish shaded areas). This is a potential crash period in financial markets.

The blue dotted diagonal is the longitude of Lunar Mean Node.
The blueish verticals indicate the changes in the motion of the Lunar True Node.

The plane in which the Moon orbits the Earth is inclined at 5°09’ to the plane of the ecliptic and this plane rotates slowly over a period of
18.61 years. Over this 18.61-year nodal period the amplitude of the lunar declination increases slowly. The maximum lunar monthly declination
north and south of the equator varies between 18°18’ and 28°36’. There are maximum values of the lunar declination in 1969, 1987, 2006, 2025
and 2043, and minimum values in 1978, 1997, (September) 2015, 2034 and 2053.

The plane of the lunar orbit precesses in space completing a revolution in 6798.3835 days or 18.612958 years. The Lunar Node
enters a new sign of the zodiac (30°) every 1.551 years or every 18.613 months = 1.55 years = 80.9 weeks = 566.53 CD / 8 =
10.12 week cycle = 55 Trading Days

S&P 500 vs Lunar Node's Speed

There is a remarkable correlation between the Speed of the Lunar Node (a.k.a. North Node a.k.a. Rahu; speed = motion in degrees longitude per unit of time, e.g. per day) and short term changes in the trend (ST CITs) of financial markets when 

1. the speed of the [true] lunar node is 0, and  
2. the lunar node changes direction [ = Min and Max of the swings].

The result is a fast cycle of 2 - 7 CD (Calendar Days). Of course every now and when these ST CITs also meet with major CITs. This motion is known to astrologers and astronomers alike as the retrograde / stationary / direct motion of the lunar node. During lunar and solar eclipses the lunar node starts wobbling, that is it moves back and forth, retrograde, stationary, direct, etc. very quickly (see Moon Wobbles in a NASA animation HERE). And as the Sun approaches 180° towards the node - e.g. in late May 2012 - the lunar node's motion is almost blocked. Some call it the lunar standstill. This is a potential crash period in equity markets.

In astrology the Lunar Node represents the mass, the public at large, also foreign elements or strangers (HERE). So in a market it would mean overseas investors if the North Node were in the 7th house or in the 9th house, in the 3rd house = foreign news, in the 2nd = foreign money, in 10th foreign foreign government, in the 12th, the 6th, and the 8th = foreign losses.

The lunar nodes precess rather quickly around the ecliptic, completing a revolution (called a draconitic or nodical period, the period of nutation) in 18.6 years (note that this is not the same length as a saros). The lunar orbit is inclined by about 5 degrees on the ecliptic: hence the Moon can be up to about 5 degrees north or south of the ecliptic. The ecliptic is inclined by about 23.4° on the celestial equator, the plane that is perpendicular to the rotation axis of the Earth. As a consequence, once during the 18.6-year nodal period, when the ascending node of the Moon's orbit coincides with the vernal equinox, then the Moon reaches extreme northern and southern declinations (Lunar Node's Declination Cycle). Then it also has its extreme northern and southern azimuth points of rising and setting on the horizon; its extreme lowest and highest altitude when crossing the meridian; and potentially extreme late first sightings of the New Moon (more HERE). 

The cycle of the true Lunar Node is always exactly 18.613 Solar Years = 6798.364 CD. The 4th harmonic of 18.618 Solar Years is 1,699.591 CD = 4.6 Solar Years. Hence the North Node moves 30° and enters a new sign in the zodiac every 1.55 Solar Years (= 18.613 months):

18.613 Solar Years / 12 

= 18.613 months
= 1.55 years
= 80.9 weeks 

= 566.53 CD
= 566.53 CD / 8
= 10.12 weeks
= 55 TD (Trading Days)

It was astrologer Carl Payne Tobey (1902-1980) who coined the term Moon Wobble. After a painstaking examination of a large number of major disasters, involving fires, bad weather and loss of life, he found that many of the most serious and traumatic catastrophes occur in association with eclipses, especially when other dire planetary aspects coincided. He also found however that such evils are not exclusively linked to eclipses and may also occur when the Sun forms a T- square to the nodal axis. He called this a Moon Wobble, for it is when the Moon is wobbling in its path by declination. So, when the Sun is conjoined with either node or in this T-square to the nodal axis, this raises the likelihood of major environmental damage, loss of life or property, or other dire effects (more HERE).