Loop/Prompt Library / Learn: Investing
💬 AI prompt: The coin-flip test: does it beat luck?
The coin-flip test asks: would random guesses have done just as well as this 'secret system'?
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I want to test whether a trading rule beats random luck. The rule is: [describe rule]. Help me design a simple test that compares it to 100 randomly timed entries with the same exits and the same costs, split into two time periods. Explain the steps in plain English and tell me what result would mean 'no edge'. Do not tell me whether to trade it. Stop after the test design.
How to use it
- Open Grok Bot, ChatGPT, Gemini or Claude — any of them works.
- Paste the prompt and fill in every [bracket]. Black out names, account numbers and member IDs first.
- Read the answer and double-check anything important before you act on it.
Not medical, legal or financial advice. The AI drafts; you decide and you press send.
More prompts like this
One-minute challenge: Investing
Your first try at using AI on this topic.
Index funds: owning the whole haystack
An index fund lets you own a tiny piece of hundreds of companies at once, for a small yearly fee.
Costs decide more than you think
Fees come out every year whether you win or lose, so small fees add up to big money over time.
Diversification: don't let one thing sink you
Diversification means not putting all your eggs in one basket.
Time and steady habits
Putting in money on a regular schedule and leaving it alone for years usually works better than trying to guess the perfect time.
Verify the track record and the person
Before you trust anyone with your money, look them up for free in the government's databases.