The Microcap Minute Classroom. Module 10, chapter 1: The only rule: do not blow up <div class="learn" markdown="1"> **What you will learn** - What "blowing up" means, and why it is the one mistake you cannot come back from - The surprising maths of losses: why losing half means you must double - What the word "risk" really means in investing - Why even Apple publishes pages of things that could hurt it </div> Think of a cricket batter walking in to open the innings. Her first job is not to hit sixes. Her first job is to not get out, because a batter sitting in the pavilion cannot score any more runs. Money works exactly the same way. Before anything else in this classroom matters, you need one rule: do not blow up. To blow up means to lose so much of your money that you cannot keep playing. Not a bad month, not a red day on a screen. A loss big enough that the game is over for you. ## The maths nobody tells you first Losses and gains are not equal. This sounds wrong, so let us do the sums with pocket money. Say you saved ₹1,000 (about $12) over a few months. - Lose 10%: you have ₹900 left. You need about an 11% gain to get back to ₹1,000. Fine. - Lose 50%: you have ₹500 left. You now need a 100% gain. Your remaining money must double, just to return to where you started. - Lose 90%: you have ₹100 left. You need a 900% gain. Almost nobody ever does that. - Lose 100%: nothing is left, and no percentage of zero is anything but zero. See the trick? The deeper the hole, the more superhuman the climb out. A 50% loss demands a 100% recovery. That is why experienced investors sound obsessed with avoiding big losses. They are not being negative. They have done this maths. ## What "risk" actually means In everyday speech, risk means "the price jumps around a lot". In this classroom, risk means something sharper: the chance of a permanent loss, money you never get back. A share price wiggling up and down is weather. A permanent loss is the house burning down. Your job is to protect the house. ## Even Apple tells you what could hurt it You might think giant companies are safe from all this. Let us check. Every US-listed company must file a big yearly report with the SEC (the Securities and Exchange Commission, the referee of US markets). This report is called a 10-K, and one section of it, Item 1A, is titled "Risk Factors". The company must write down, in plain sight, the things that could seriously hurt its business. Notice the size of Apple's numbers on this page: this is one of the most valuable companies on Earth. Notice that this section does not stop after one paragraph: Apple's risk list runs for many pages. Read that again. Apple, with more money and smarter lawyers than almost anyone, still stands up every year and says: here are the many ways this could go wrong. If even Apple has pages of risks, imagine the list hiding inside a tiny company you heard about in a video. We are not saying Apple is a good or bad investment. We never will; this classroom teaches method, not tips. The point is simpler: no company is risk-free, and the honest ones say so in writing. ## The honest part This chapter is not exciting, and that is exactly why people skip it. Most beginners rush straight to "how do I find the next big winner". The ones who last are the ones who first learned how not to lose everything. Boring? Yes. Optional? No. <div class="try" markdown="1"> **Try it yourself** Open Apple's latest 10-K on SEC.gov (start from Apple's EDGAR page, the link is below). Scroll to Item 1A, Risk Factors. Count how many separate risk headings there are. Then pick one risk, read it slowly, and explain it in your notebook in your own words, as if you were telling a friend. Ten minutes, and you will have done something most adult investors never bother to do. </div> <div class="takeaways" markdown="1"> **Key takeaways** - Rule one of investing: do not blow up. Every other skill comes after this one. - Losses are not symmetrical: lose half your money and you must double what is left just to get even. - Risk means the chance of permanent loss, not daily price wiggles. - No company is risk-free; even Apple files pages of risk factors every year. - Only ever invest money you can afford to lose. </div> **Read one real thing:** [Apple's 10-K for fiscal 2024](https://www.sec.gov/Archives/edgar/data/320193/000032019324000123/aapl-20240928.htm), the real filing on SEC.gov. Go straight to Item 1A and notice how many pages of risks a world-class company considers worth writing down.. I am Ritu, a synthetic voice, and the words I am reading are Ayush Agrawal's.

# The only rule: do not blow up <div class="learn" markdown="1"> **What you will learn** - What "blowing up" means, and why it is the one mistake you cannot come back from - The surprising maths of losses: why losing half means you must double - What the word "risk" really means in investing - Why even Apple publishes pages of things that could hurt it </div> Think of a cricket batter walking in to open the innings. Her first job is not to hit sixes. Her first job is to not get out, because a batter sitting in the pavilion cannot score any more runs. Money works exactly the same way. Before anything else in this classroom matters, you need one rule: do not blow up. To blow up means to lose so much of your money that you cannot keep playing. Not a bad month, not a red day on a screen. A loss big enough that the game is over for you. ## The maths nobody tells you first Losses and gains are not equal. This sounds wrong, so let us do the sums with pocket money. Say you saved ₹1,000 (about $12) over a few months. - Lose 10%: you have ₹900 left. You need about an 11% gain to get back to ₹1,000. Fine. - Lose 50%: you have ₹500 left. You now need a 100% gain. Your remaining money must double, just to return to where you started. - Lose 90%: you have ₹100 left. You need a 900% gain. Almost nobody ever does that. - Lose 100%: nothing is left, and no percentage of zero is anything but zero. See the trick? The deeper the hole, the more superhuman the climb out. A 50% loss demands a 100% recovery. That is why experienced investors sound obsessed with avoiding big losses. They are not being negative. They have done this maths. ## What "risk" actually means In everyday speech, risk means "the price jumps around a lot". In this classroom, risk means something sharper: the chance of a permanent loss, money you never get back. A share price wiggling up and down is weather. A permanent loss is the house burning down. Your job is to protect the house. ## Even Apple tells you what could hurt it You might think giant companies are safe from all this. Let us check. Every US-listed company must file a big yearly report with the SEC (the Securities and Exchange Commission, the referee of US markets). This report is called a 10-K, and one section of it, Item 1A, is titled "Risk Factors". The company must write down, in plain sight, the things that could seriously hurt its business. Notice the size of Apple's numbers on this page: this is one of the most valuable companies on Earth. Notice that this section does not stop after one paragraph: Apple's risk list runs for many pages. Read that again. Apple, with more money and smarter lawyers than almost anyone, still stands up every year and says: here are the many ways this could go wrong. If even Apple has pages of risks, imagine the list hiding inside a tiny company you heard about in a video. We are not saying Apple is a good or bad investment. We never will; this classroom teaches method, not tips. The point is simpler: no company is risk-free, and the honest ones say so in writing. ## The honest part This chapter is not exciting, and that is exactly why people skip it. Most beginners rush straight to "how do I find the next big winner". The ones who last are the ones who first learned how not to lose everything. Boring? Yes. Optional? No. <div class="try" markdown="1"> **Try it yourself** Open Apple's latest 10-K on SEC.gov (start from Apple's EDGAR page, the link is below). Scroll to Item 1A, Risk Factors. Count how many separate risk headings there are. Then pick one risk, read it slowly, and explain it in your notebook in your own words, as if you were telling a friend. Ten minutes, and you will have done something most adult investors never bother to do. </div> <div class="takeaways" markdown="1"> **Key takeaways** - Rule one of investing: do not blow up. Every other skill comes after this one. - Losses are not symmetrical: lose half your money and you must double what is left just to get even. - Risk means the chance of permanent loss, not daily price wiggles. - No company is risk-free; even Apple files pages of risk factors every year. - Only ever invest money you can afford to lose. </div> **Read one real thing:** [Apple's 10-K for fiscal 2024](https://www.sec.gov/Archives/edgar/data/320193/000032019324000123/aapl-20240928.htm), the real filing on SEC.gov. Go straight to Item 1A and notice how many pages of risks a world-class company considers worth writing down.

That was chapter 1 of module 10. The text, the pictures and the exercise are on the lesson page. Thank you for listening.