# Yunjanghyeok jeo investing book with 87,066 redemption cases: Yunjanghyeok jeo Investment Rules - By Haeundae Banchan Tray (https://superchart.com/en/@side-dish-plate/) - Written Nov 7, 2026 - Products › Books & stationery - Product provided: The product was provided free of charge. - English edition: https://superchart.com/en/@side-dish-plate/els-investment-rules-data-book/ - Also in: [한국어](https://superchart.com/ko/@side-dish-plate/els-investment-rules-data-book/index.md) ## In short Yunjanghyeok jeo Investment Rules (Yunjanghyeok jeo 투자의 법칙) is a personal finance book by Yoon Jang-hyeok that analyzes the actual redemption results of 87,066 Yunjanghyeok jeo (equity-linked securities) issued between 2015 and 2025. A blogger who had bought an Yunjanghyeok jeo on a bank employee's word used the book's statistics and 13-item checklist to review their own Yunjanghyeok jeo account. Verdict: Yunjanghyeok jeo Investment Rules gives you clear criteria for weeding out bad Yunjanghyeok jeo before you go looking for a good one. ## Good to know - **Book title**: Yunjanghyeok jeo Investment Rules (Yunjanghyeok jeo 투자의 법칙): The Real Face of Yunjanghyeok jeo Revealed by 100,000 Data Points - **Author**: Yoon Jang-hyeok (윤장혁) - **Data analyzed**: Actual redemption results of 87,066 Yunjanghyeok jeo issued from 2015 to 2025 - **Key statistics**: 93.80% redeemed early, 2.08% lost money at maturity, 85.11% of losses fell between -60% and -30% - **Bonus content**: 13-item checklist for reviewing an Yunjanghyeok jeo before you buy or while you hold it *Prices as written by the tester on Nov 7, 2026 · not updated automatically* ![Cover photo of the book ELS Investment Rules](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-01-1fiae-m-1200.webp) ## I bought an Yunjanghyeok jeo on a bank teller's word. Is it really safe? If you signed up for an Yunjanghyeok jeo at the bank counter just because you heard "great terms, it gets redeemed early," Yunjanghyeok jeo Investment Rules answers that anxiety with data. I did exactly that. The teller said the terms were good and it would be redeemed early, so I jumped in. It's safe, right? When deposit interest feels too measly and stocks feel too scary, Yunjanghyeok jeo is what the bank counter recommends most, isn't it? I once put in a big lump sum after hearing, "Sir, almost all of these get redeemed early, so it's safe~" But whenever the news says stock indexes are crashing, like the recent Hong Kong H-share index mess, my heart drops, afraid my hard-earned money will be cut in half. ![ELS Investment Rules, found amid worries about ELS losses](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-02-1n5wj-m-675.webp) Just as I was feeling uneasy, thinking "Is it okay to leave my money rolling who-knows-where, trusting what someone else told me?", I found a book that blasts that vague anxiety away. It's Yoon Jang-hyeok's Yunjanghyeok jeo Investment Rules, which digs into the real face of Yunjanghyeok jeo with 100,000 actual redemption records instead of vague gut feeling! ## What data does Yunjanghyeok jeo Investment Rules analyze? Yunjanghyeok jeo Investment Rules covers the actual redemption results of 87,066 analyzable Yunjanghyeok jeo issued from 2015 to 2025. The persistence it took to analyze the real results hidden behind financial companies' glossy brochures, one by one, is where this book starts. Investment books usually have lots of vague stuff from so-called experts, like "in my experience it goes like this~" or "the trend these days is like this~", right? ![Book content on analysis of actual ELS redemption data](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-03-ns8zc-900.webp) But the author, Yoon Jang-hyeok, sticks to the facts with a thoroughly financial-engineering mindset. He lays out all 87,066 actual redemption records one by one. ### 93.80% early redemption, 2.08% maturity loss According to the book's analysis, 93.80% of the total were happily redeemed early, but the remaining 2.08% took painful losses at maturity. ![Page on ELS early redemption and maturity loss rates](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-04-591r9-900.webp) In particular, seeing with my own eyes the shocking fact that 85.11% of the loss cases were concentrated in the enormous negative range of -60% to -30% really snapped me awake! ✨ ![Book page on analysis of ELS loss ranges](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-05-ononk-m-900.webp) ## Is an Yunjanghyeok jeo with a high coupon always a good product? Yunjanghyeok jeo Investment Rules uses data to correct the illusion that a high coupon (interest) and No Knock-in products are automatically safe. Does more interest always mean better? Are No Knock-in products really 100% safe? It irons out all the misconceptions we had. ![Book content on high-coupon and No Knock-in ELS](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-06-am0vw-900.webp) When the bank offers a high coupon (interest) rate, it's easy to bite with "Oh, great terms!" We may also assume that when several underlying assets are bundled, the risk spreads out by itself. ![Book content on the number of underlying assets and ELS risk](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-07-1fvtj-900.webp) ### Why more underlying assets can actually mean more risk But this book completely flips that complacent bit of money wisdom with 100,000 data points. It explains very intuitively, without complicated formulas, why more underlying assets actually make things riskier, and what the timing of your purchase and the fair value mean for your account. ![Book page explaining purchase timing and fair value](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-08-1phwe-900.webp) > Before you try to find a good Yunjanghyeok jeo, filter out the 'bad Yunjanghyeok jeo' that eat away your money. This principle from the author was a really hard-hitting, practical tip. 💛 ![Book content on the principle of filtering out bad ELS](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-09-1p3f3-900.webp) ## A 13-item checklist to run before buying an Yunjanghyeok jeo The latter part of Yunjanghyeok jeo Investment Rules includes a 13-item checklist for reviewing an Yunjanghyeok jeo before you buy or while you hold it. You don't need to know hard financial engineering terms. With the 13-point checklist you must check before buying, you can protect your own money. ![Page introducing the 13-point checklist before buying an ELS](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-10-3z455-900.webp) What I liked most is that the book doesn't stop at passing on knowledge. You can use the 13-item checklist to check the product you've been eyeing, or the Yunjanghyeok jeo already stuck in your account. ![The 13-item ELS checklist in the latter part of the book](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-11-ta4m2-900.webp) ### Weekend evening, bank app open, plugging in my own account On a weekend evening, I sat at my desk with a pen, opened my bank app, and went through the checklist one item at a time... and I ended up reflecting on how I'd been investing in Yunjanghyeok jeo blindly, without even knowing the product structure. ![Reviewing a held ELS with the checklist](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-12-cpg0v-900.webp) It becomes a solid reference point so you can judge risk yourself without being swayed by other people's words! 👍 ## Who is Yunjanghyeok jeo Investment Rules for? Yunjanghyeok jeo Investment Rules suits Yunjanghyeok jeo investors who don't want to keep worrying over "there's almost no chance of losing principal~" In the end, what protects your hard-earned assets is your own eye and the power to look at facts. ![Closing photo of the book ELS Investment Rules](https://img.superchart.com/images/els-investment-rules-data-book/els-investment-rules-data-book-13-auxo5-900.webp) If you're someone who sighs while checking stock indexes on your phone every day, pick up Yunjanghyeok jeo Investment Rules: What 100,000 Data Points Reveal About Yunjanghyeok jeo, and protect your account firmly with real data! 👇 ## Products - Yunjanghyeok jeo ELS Investment Rules (book) — Yunjanghyeok jeo --- Superchart · https://superchart.com/en/@side-dish-plate/els-investment-rules-data-book/ · https://superchart.com/llms.txt