Video summary

주린이 보육교사 존마의 주식 기초 강의 (1~3편 몰아보기)

Main summary

Key takeaways

Finance

Finance-focused summary of the subtitles

Core framework: 2 ways to make money in stocks

1) Value investing (주식의 “기업을 산다”)

  • Buy companies based on fundamentals.
  • Requires patience and “faith” to endure volatility.
  • Involves studying:
    • Financial statements (explicitly emphasized)
    • Confidence that the company is trustworthy

2) Trading (price-based investing)

  • Profit from price movement using charts/numbers.
  • Often requires understanding market psychology/sentiment and managing risk.

Common hybrid approach (combined)

  • “Buy good companies cheaply”
  • Then use price awareness and hold long-term.

Valuation / financial-metric checklist taught

The instructor suggests company value can be assessed using three key items from financial statements:

  • Total assets
    • Example: “100,000 won”
  • Past-year profit
    • Example: “10,000 won per year”
  • Market capitalization
    • Example: “1,000,000 won” total stock value

These produce derived metrics:

  • ROE (profit relative to total assets)
    • Example: Profit 10,000 / Assets 100,000 = 10% ROE
  • PBR (market cap relative to total assets)
    • Example: Market cap 1,000,000 / Assets 100,000 = 10x PBR
  • PER (Price-to-Earnings Ratio) (valuation multiple based on earnings)
    • “Global successful company” example range: PER ~ 10–20
    • US tech example: NVIDIA PER ~ 30–40
    • Korea examples: Samsung Electronics and SK Hynix are described as having lower PER/PBR than global companies—implying potential for re-rating (exact figures not provided beyond “low”)

Implied caution: Value investing is “not easy” because stocks don’t rise smoothly—investors must hold through drawdowns.

Corporate earnings quality: operating vs. net profit (risk signal)

The subtitles distinguish:

  • Operating profit
    • Profit remaining after subtracting costs tied directly to operations (e.g., rent, labor, ingredients).
  • Net profit
    • Operating profit plus/minus other items (e.g., loan interest, real estate gains/losses, other non-operating expenses).

Risk logic / recommendation:

  • High net profit but low operating profit can be dangerous:
    • May come from one-off items (e.g., real estate gains)
    • Or from “money leaking” via debt/loopholes
  • Low operating profit and low net profit:
    • “Don’t even go near it” (strong negative view)

Macro driver taught: interest rates (and Fed stance) as the “price of money”

A major performance driver emphasized:

  • Interest rate direction strongly impacts stock markets.
    • Rising rates
      • Money becomes more valuable
      • Borrowing costs increase
      • Companies may reduce investment
      • Market size can shrink; investors may prefer deposits
    • Falling rates
      • Borrowing becomes easier
      • More corporate investment
      • Investors search for yield; liquidity flows into stocks

US policy framing: Fed and the hawk/dove concept

  • The video stresses the importance of the US Federal Reserve and the Fed chair’s viewpoint.
  • Hawks: raise rates aggressively to control inflation
  • Doves: lower rates to boost liquidity/corporate investment
  • A “neutral” stance is also mentioned (played for comedy in the subtitles).

Explicit example

  • Mentions a rumored hawk: Kevin Warsh (as a Fed-chair nominee).
  • Suggests this kind of talk can cool markets by increasing expectations of rate hikes.

Timeline concept

  • Stocks react to expectations (including rumors) and sentiment shifts, not only realized rate changes.

Market psychology / sentiment examples (the “irrational” side”)

The instructor argues markets reflect sentiment/psychology beyond fundamentals.

  • AI-related stock moves tied to Sam Altman / OpenAI visiting (subtitles reference 2024)
  • A manga creator death (Akira Toriyama) linked (via wordplay in subtitles) to a Korean toy-company spike (“Sonhogong”/“Son Ho-gong”)

Theme stocks (테마주)

  • Beginners chase hype after hearing a “reason,” often without real fundamentals.

  • Key caution: Theme stocks are “very dangerous.”

Election-related “stocks”

  • Subtitle suggests these can rise on anticipation but can plunge immediately after the election.

Risk: short selling and who bears losses

What short selling is (공매도)

  • Borrow a stock, sell it, then buy it back later to return shares.
  • Profit occurs when the stock falls (repurchase cost is lower).

Retail investor disadvantage

  • Retail investors can be disadvantaged because institutions/foreigners may access short selling more easily.

Caution: Be careful entering stocks with high short-selling pressure.

Short selling’s role

  • It can help burst bubbles, but it’s viewed negatively in Korea due to individual access limitations and alleged abuses (subtitles mention illegality via improper borrowing/acting as if borrowed).

Chart / trading mechanics taught (candlesticks & gaps)

Candlestick structure

  • Opening price vs closing price
  • Body: open-to-close range
  • Upper/lower wicks (tails): intraday high/low

Note on candle colors: the subtitles say colors differ by country; details were garbled, but the concept was taught.

Numeric examples

  • Bullish day: open 1,000 won, close 1,100 won
  • Bearish day: open 1,000 won, close 800 won

Gap risk (gap up/down)

  • If next day opens at 12,000 won after prior close 10,000 won → gap up
  • If next day opens at 8,000 won → gap down

Trading time references (subtitles)

  • Orders around 8:30
  • Market open: 9:00
  • Close: around 15:30
  • After-hours activity can extend to 8:00 for some stocks

S&P 500 product investing + taxes (major actionable section)

The video highlights S&P 500 as a default “safe-ish” long-term option, with notable tax complexity.

What it is

  • S&P 500 = bundled index tracking 500 US companies
  • Invest via:
    • US-listed products: SPY, VOO
    • Korea-based products that replicate/track S&P 500 (examples mentioned: Tiger S&P 500, Codex S&P 500; names partly garbled)

Key tax cautions (Korea perspective emphasized)

  • Subtitle claims S&P 500 products are subject to 15.4% tax.

  • Mentions additional mechanics using an example:

    • Broker fee/deduction concept: “2.5 million won deducted each time I trade” (wording unclear; likely simplified by captions)
    • Example shown: profit 10 million won → subtract 2.5 million won → remaining taxed at ~22% on the rest (exact logic may be oversimplified by auto-captioning)

  • Comprehensive income tax threshold

    • If financial income exceeds 20 million won/year, it may trigger comprehensive taxation
    • Progressive up to 45% (as stated in subtitles)
  • Health insurance contributions may also be affected.

Actionable recommendation: use tax-advantaged accounts

Suggestions include:

  • ISA for flexibility if time horizon is shorter
  • IRP / pension savings for long-term retirement
  • The idea: tax deferral / lower effective tax by postponing taxes

Timing examples from subtitles

  • If planning to spend in 2–5 years → ISA
  • Retirement after age 55 → IRP/pension savings (withdrawal after 55)

No clear “not financial advice” disclaimer appears in the subtitles provided.

Investing behavior / psychology and investor fit

The instructor emphasizes “no one right answer” and matching strategy to temperament:

  • Identify strength against:
    • Fear (when prices fall)
    • Greed (when prices rise)

Beginner traps called out

  • “Beginner’s luck”
    • Many beginners enter during bull markets and think they’re geniuses.
  • If profit is only 5–10%, beginners may sell early.
  • Over time, they can get stuck in a “kick-the-can” behavior (kakdongcha), gradually reducing returns.

Notable tickers / assets / sectors mentioned

  • KOSPI (index; referenced near ~5,000)
  • NVIDIA (PER example 30–40)
  • Samsung Electronics
  • SK Hynix (semiconductors; “HBM” referenced as memory tech)
  • LG Chem (mentioned in the context of a corporate-splitting/“LG Anthology” follow-up scenario; subtitles inconsistent)
  • S&P 500
    • ETFs/products: SPY, VOO
    • Korea-listed trackers mentioned: Tiger S&P 500, Codex S&P 500
  • Semiconductors (sector)
  • Robots (theme)
  • Electric vehicles / secondary batteries (theme; EV/battery stocks drop in a “Kekeke/K” downturn concept in subtitles)
  • ETFs / funds (general instrument class)

Key numbers and ranges explicitly stated

Valuation examples / ranges

  • Assets: 100,000 won
  • Profit: 10,000 won/year
  • ROE 10%
  • Market cap: 1,000,000 won
  • PBR 10x
  • PER “global successful company”: 10–20
  • NVIDIA PER: 30–40
  • Mentioned PERs above 30x (“Daiesong”/“Dia” unclear due to subtitles)
  • Market/index example:
    • KOSPI ~ 5,000
    • Futures scenario toward 6,000 (fictional in subtitles)

Trading / chart examples

  • Candlestick examples: 1,000 → 1,100 won, and 1,000 → 800 won
  • Gap examples:
    • Close 10,000 → Open 12,000 (gap up)
    • Close 10,000 → Open 8,000 (gap down)
  • Trading times:
    • Orders around 8:30
    • Open 9:00
    • Close around 15:30
    • After-hours until 8:00 for some stocks

Interest rates / Fed example

  • Kevin Warsh (rumored hawk)

Tax examples for S&P 500

  • 15.4% tax mentioned
  • Comprehensive taxation threshold: 20 million won/year
  • Max progressive rate mentioned: up to 45%

Behavioral / profit thresholds

  • Beginner satisfaction threshold: 5–10%

Disclosures / disclaimers

  • No clear “financial advice” disclaimer is present in the provided subtitles.

Presenters / sources mentioned (end)

  • Presenter/instructor: Johnma / 존마 / 주린이 보육교사 존마
  • Student/character: Kim Yo-seong, later Kim Ju-ho / 주호 / Juho
  • Public figures in examples:
    • Sam Altman (OpenAI)
    • Akira Toriyama (Dragon Ball)

Original video