What cycle and contraception studies measured, why they do not validate trading dates, and how to evaluate investments using relevant information.
The studies reviewed here do not validate a menstrual-cycle calendar for buying, selling or avoiding trades. They examine specific experimental choices and report both positive and null findings. Those results are different from evidence about portfolio returns. Evaluate investments through goals, risks, costs and relevant professional guidance; cycle notes or astrology are not established trading signals.
The studies reviewed here do not validate a menstrual-cycle calendar for buying, selling or avoiding trades. They examine specific experimental choices and report both positive and null findings. Those results are different from evidence about portfolio returns. Evaluate investments through goals, risks, costs and relevant professional guidance; cycle notes or astrology are not established trading signals.
The studies reviewed here do not establish when you should trade based on your menstrual cycle. Some experiments find differences in particular economic choices; others do not. Neither kind of finding, by itself, validates a personal calendar for buying, selling or withholding trades.
The previous version of this article recommended avoiding major trades during particular menstrual days, linked premenstrual worry to selling decisions and presented astrology as an additional financial timing layer. Those instructions have been removed. The article now explains what the research measured and gives general questions for evaluating decisions without a phase-based rule.
In a PLOS ONE study published in 2016, researchers tested 36 naturally cycling women across four phases. They found lower loss aversion around ovulation in mixed gain-and-loss gambles. The overall phase effect on gain-only risk aversion was not significant. A separate preference-consistency task found no significant phase difference in its rationality measure.
This is a positive finding about a particular laboratory measure. It does not show that ovulation makes someone a better investor, that menstruation makes someone irrational, or that a rule about trading days improves returns. Loss aversion, risk preference, impulsivity and profitability are different outcomes.
A study published in 2023 tested 124 naturally cycling women during ovulation and menstruation using incentivized decision tasks. The authors reported no systematic behavioral differences between those phases. This is a null result for the studied tasks and participants, not proof that hormones never affect any person's experience.
Neither experiment followed a cycle-based strategy in personal brokerage accounts. Applying its results to stock trades, retirement decisions, fundraising or hiring would require evidence about those different outcomes. The earlier lifestyle and entrepreneurial timing claims were not established by these experiments.
A randomized contraceptive trial assigned 340 women to three months of one combined oral contraceptive or placebo. It found no significant effects on its primary economic-preference outcomes, which included financial-risk tasks. The study did not measure actual portfolio returns.
Its findings cannot be generalized without qualification to every contraceptive formulation, population or individual response. They also do not justify the earlier categorical statement that hormonal contraception changes investment behavior. Biological changes, reported symptoms and measured trading outcomes are distinct questions.
The NHS combined-pill guidance says some users report mood changes and advises discussing problematic side effects with a pharmacist or doctor. That is clinical information, not evidence for a trading strategy. Do not start, stop or switch contraception to influence investment decisions. Discuss health concerns with an appropriate clinician, separately from financial planning.
A calendar or app estimate does not reproduce the hormone measurements used in an experiment. A personal journal may help describe how you felt, but it does not establish a hormone level, a diagnosis or a market opportunity.
If you want to keep notes, distinguish observations from interpretations: what decision was considered, what information was available, how you felt and what happened later. Include occasions when an expected pattern did not occur. Market movements, circumstances and chance can change alongside mood; a few observations cannot separate those explanations.
Tracking is optional. Menstruating does not establish that someone is financially unreliable or unable to make decisions. A person does not need to disclose cycle information to an investment professional to receive advice based on their circumstances.
The cycle experiments above did not test Mercury retrograde, Saturn transits or a combined cycle-and-chart investing system. Optional symbolism does not supply the missing evidence for the article's proposed financial rules.
Researchers have studied lunar phases and historical market returns. An original observational paper reported an association in its historical sample. That does not establish this article's personal hormone mechanism or a profitable, current strategy after costs. This editorial review has not verified such a strategy's independent replication or future performance.
An association, a causal explanation and an investment recommendation are different claims. Astrology may be a voluntary reflection activity; it should not be presented here as a validated signal to buy, sell or postpone a financial obligation.
The SEC's Investor.gov guide to asset allocation and diversification discusses goals, time horizon and the ability and willingness to bear losses. Diversification spreads exposure; it does not guarantee gains or remove all risk. A narrowly focused fund does not necessarily provide broad diversification.
Its questions to ask before investing focus on understanding the investment, checking the seller and relevant registration, assessing risks and finding appropriate help. These are US investor-education resources; registration requirements and available checks depend on the reader's jurisdiction.
Use that information to frame questions about an actual proposed decision: What is the goal and horizon? What loss could you absorb? What do the official disclosures say? What costs and obligations apply? Which credentials can be checked with the relevant regulator? What new evidence would change your reasoning?
This is an educational outline, not a recommended allocation or a return-improvement intervention. It does not prescribe an index fund, automatic contribution, fixed waiting period or universal portfolio-review schedule. Real deadlines and individualized advice should not be overridden by a cycle or astrology calendar.
Our app offers astrological content for optional reflection. This article does not establish that an app profile measures financial risk preferences, identifies a suitable investment date or improves returns. Keep symbolic interpretation separate from regulated financial advice and clinical care.
For terminology in our astrological material, see natal chart and retrograde. These definitions are not trading advice. Our editorial policy explains the site’s content approach.
AI-assisted editorial content. This article provides general information, not individualized medical, financial, investment or legal advice. It does not prescribe a trade or a change to contraception.
No. The reviewed experiments measured particular choices, such as responses to monetary gambles, rather than a profitable personal trading calendar. Positive laboratory findings and null findings do not establish when an individual should buy or sell.
No. Risk preferences concern choices under uncertainty; loss aversion concerns the relative weight of losses and gains. A task-specific change in one measure is not automatically impulsivity, poor judgment or a change in investment performance.
That conclusion is not established here. A randomized study of one combined pill found no significant effects on its primary economic-preference outcomes. Its formulation, population and tasks limit generalization, and it did not measure personal stock-market returns.
Notes can describe personal experience, but a few cycles do not establish hormone levels, causation or a profitable strategy. Market conditions and other circumstances may differ. A favorable result is not proof that a cycle phase caused it.
The reviewed cycle and contraception experiments did not test a combined astrology-and-cycle trading method. An astrological interpretation or historical market association does not establish this article’s personalized financial timing rules.
General investor education discusses goals, time horizon, ability to absorb losses, investment risks, fees and official disclosures. Check a professional’s credentials through the relevant regulator. This article does not select a security, allocation, contribution rate or trade for you.
Get personalized insights based on your birth chart
Go deeper
A free placement is the headline. A full reading interprets your whole chart.
Get a complete personalized astrology reading based on your birth details.
