Which Retrogrades Actually Move NIFTY?

Ask the internet which astrological event ruins markets and you'll hear one answer on repeat: Mercury retrograde. Don't sign contracts, don't launch anything, and whatever you do, don't trade. It is the single most-feared event in popular astrology.

But before we can ask whether that fear is justified, we have to be honest about something most market-astrology writing skips: what a retrograde actually is, what the tradition actually claims, and what serious researchers have actually found about the sky and the stock market. Only then do our own numbers — every planetary retrograde measured against the NIFTY since 1990 — mean anything. So this piece goes in that order: the phenomenon, the scholarship, the data, the breakdown, and finally the interpretation.

First: what is a retrograde?

A retrograde is, quite literally, an optical illusion. From Earth, a planet usually appears to drift eastward against the fixed stars night after night. A few times in its cycle it seems to slow, stop, and crawl backward (westward) for weeks or months before resuming. Nothing in the heavens has actually reversed.

The illusion comes from relative orbital speed, as standard astronomy explains (apparent retrograde motion). For the outer planets — Mars, Jupiter, Saturn and beyond — Earth travels faster on its inner track and periodically overtakes them, the way a faster car makes a slower one look like it's sliding backward. For the inner planets, Mercury and Venus, the apparent reversal happens as they swing between Earth and the Sun.

This matters for everything that follows, because it sets the clock:

• Mercury turns retrograde three to four times a year, for only about three weeks each time.
• The outer planets (Jupiter, Saturn, Uranus, Neptune, Pluto) go retrograde roughly once a year, but for four to six months at a stretch.

Hold onto that. The wildly different durations turn out to be the single most important fact in the data.

What astrology makes of it

In popular Western astrology, a retrograde planet's themes turn "inward" — review, revision, delay, things coming back around. Mercury rules communication, contracts, travel and commerce, so Mercury retrograde became shorthand for miscommunication, botched deals, technology failures and — by easy extension — market trouble. That association is cultural, not canonical, and it's the source of nearly all the doom narratives online.

The classical Indian tradition tells a more interesting story. In Vedic astrology a retrograde planet is called vakri, and far from being weak, it is considered energised. In the Shadbala ("six-fold strength") system of the Brihat Parashara Hora Shastra, a planet earns Cheshta Bala — "motional strength" — from its movement, and a retrograde planet is assigned the maximum value (60 virupas, the top of the scale). The astronomical reason tracks the astrological one: a planet is retrograde precisely when it is near its closest approach to Earth, appearing biggest and brightest.

So the tradition's own scripture says a retrograde planet is strong, not cursed — its effects amplified, "good or bad depending on the chart." The flat "retrograde = bad" of the horoscope columns isn't even good astrology.

What scholars find about the sky and the market

Does anything in the heavens move stock prices? Peer-reviewed finance has very little to say about retrogrades specifically — but it has studied adjacent celestial and mood-linked effects seriously, and the results are worth knowing before we look at our own.

• The Moon. In Lunar Cycle Effects in Stock Returns, Dichev and Janes (2003) found that returns in the roughly 15 days around the new moon were about double those around the full moon, across US indices and two dozen other markets. Yuan, Zheng and Zhu (2006), in the Journal of Empirical Finance, examined 48 countries and found full-moon returns running 3–5% per year below new-moon returns — an effect they showed was not explained by volatility, volume, macro announcements, or other calendar anomalies.
• The Sun. In Good Day Sunshine, Hirshleifer and Shumway (2003), in the Journal of Finance, found that morning sunshine at a country's main exchange was strongly correlated with that day's returns across 26 countries — a result they called "difficult to reconcile with fully rational price setting."

Two things stand out. First, the proposed mechanism is human mood, not magic: moonlight, sunlight and seasonal rhythms plausibly nudge investor sentiment, and sentiment moves prices. Second, the effects are small and contested — Hirshleifer and Shumway themselves note that even modest trading costs wipe out the gains, and efficient-market researchers warn that hunting through enough calendars will always surface some pattern by chance.

That is the honest backdrop for what follows. If a "retrograde effect" exists, the scholarship suggests it would be a small mood effect, not a reliable harbinger of doom — and any apparent pattern has to clear a high bar before it means anything.

What our data shows

For each planet we took every retrograde window since 1990 — the day it turned retrograde to the day it went direct — and measured the NIFTY 50 over that exact span. A period "wins" if the index closed higher than it started. This describes history; it is not a forecast, and nothing here is investment advice.

Two things jump out. Every retrograde is net positive — the NIFTY rose more often than it fell during all eight. And the most-feared one, Mercury, sits dead last on both measures, while the planets nobody worries about top the list. If you stopped here you'd write the usual click-bait — "Neptune retrograde is wildly bullish!" — and you'd be wrong.

Breaking down the data

The duration trap

Look again at "median length." Neptune stays retrograde for 109 days; Mercury for 15. Remember the astronomy — that gap is real and huge, and it contaminates the whole table. Markets drift upward over time, so a five-month window has far more room to ride that drift than a two-week one. Much of Neptune's headline +8.85% isn't a Neptune effect at all; it's time on the field.

The fix is to normalise: how much did the index move per month of retrograde?

The spread collapses. A raw range of +0.6% to +8.9% — a 15× gap that screamed "Neptune is special" — shrinks to a tight +1.2% to +3.0% per month. Most of the drama was an artefact of duration, exactly as both the astronomy and the efficient-market caution would predict.

But normalisation also surfaces the genuinely interesting result. Saturn — astrology's "great malefic," the planet of fear and restriction — has the highest per-month return of all (+3.00%), despite one of the lowest win rates (58.8%). That means Saturn-retrograde periods are fewer but bigger up-moves: higher payoff, lower hit rate, more volatile. And recall the tradition — vakri planets are strong, not weak. The data and the classical view agree, and both disagree with the horoscope column.

The three everyone names

Mercury — feared, forgettable. Three or four times a year for ~two weeks, which is why it has 110 periods, more than triple any other planet. All that frequency, and the smallest effect in the set. If Mercury retrograde "crashes" anything, the NIFTY never noticed.

Jupiter — the quiet banker. Solidly positive at 65.6%, with one striking quirk you only find by splitting indices: NIFTY Bank rose 73.9% of the time during Jupiter retrograde — the strongest planet–sector pairing in this analysis. Jupiter is the traditional significator of wealth and finance, so a banking tilt is at least a coincidence worth a closer look.

Saturn — slow, heavy, biggest mover. Middling win rate, top per-month return, banks strong (68.0%), metals weak. For the planet most associated with market fear, the record is anything but fearful — just lumpy.

It's not one market

Retrograde effects aren't uniform across the index complex:

Two patterns repeat: banks are strong under Jupiter and Saturn, and metals are the consistent laggard — weakest under every retrograde, outright negative under Jupiter (47.6%). Even Mercury, so flat on the headline NIFTY 50, was meaningfully stronger on the broader and mid-cap indices. The "retrograde" label hides as much as it reveals.

Putting it together

Three lenses, one picture:

• The folklore — "retrograde, especially Mercury, is dangerous for markets" — gets no support. Every retrograde was net positive, and Mercury was the mildest of all.
• The tradition — vakri planets are strong, their effects amplified — fits better than the folklore: the data's biggest mover is Saturn, an amplified, volatile, lumpy signal rather than a uniformly bearish one.
• The scholarship — celestial/mood effects on markets are real but small and fragile — fits best of all: once you strip out duration, the per-month differences sit in a narrow band, the kind of small effect that could be mood, could be drift, and could be noise.

And here's the honest boundary. We have not benchmarked each retrograde against the NIFTY's normal return over an equally long window, the way Yuan, Zheng and Zhu controlled their lunar effect. Win rate ignores magnitude and the path taken. A few dozen periods per planet is a small sample. So nothing here is a trading rule — it is research and education, not a signal service. Consult a SEBI-registered advisor before acting on anything.

What the data does puncture, cleanly, is the central myth. The retrograde you were told to fear is the one that moves the market least.

Frequently asked questions

What does it mean when a planet is retrograde? It's an optical illusion: from Earth the planet appears to move backward against the stars for a while, caused by the difference in orbital speed between Earth and that planet. Nothing physically reverses.

Is Mercury retrograde bad for the stock market? Historically, no. Across 110 Mercury-retrograde periods since 1990, the NIFTY 50 rose 55.5% of the time with a small +0.60% average return — the mildest effect of any retrograde we measured.

Do scholars think the sky affects markets? A handful of peer-reviewed studies find small lunar and weather/mood effects on returns (Dichev & Janes 2003; Yuan, Zheng & Zhu 2006; Hirshleifer & Shumway 2003). The proposed mechanism is investor mood, the effects are small, and many researchers remain sceptical.

Which retrograde has the strongest historical effect on NIFTY? By raw return, the long outer-planet retrogrades — but that's mostly duration. Adjusted per month, Saturn shows the highest figure (+3.0%).

Go deeper on each retrograde

Every retrograde with a full data profile — all nine NIFTY indices, sector impact, Sharpe ratios and statistical significance:

• Jupiter Retrograde
• Saturn Retrograde
• Uranus Retrograde
• Neptune Retrograde
• Pluto Retrograde

Or browse every event we track in the Astro Knowledge Bank.

References

• Dichev, I. D., & Janes, T. D. (2003). Lunar Cycle Effects in Stock Returns. Journal of Private Equity. SSRN 281665
• Yuan, K., Zheng, L., & Zhu, Q. (2006). Are Investors Moonstruck? Lunar Phases and Stock Returns. Journal of Empirical Finance, 13(1), 1–23. ScienceDirect
• Hirshleifer, D., & Shumway, T. (2003). Good Day Sunshine: Stock Returns and the Weather. Journal of Finance, 58(3), 1009–1032. JSTOR
• Brihat Parashara Hora Shastra — Shadbala / Cheshta Bala (motional strength of retrograde planets). Apparent retrograde motion (astronomy).