In one sentence: Phil carefully labels this an off-canon episode: technical indicators (moving averages, MACD, stochastic) are trading tools, not part of the Buffett and Munger approach, they may not work in future, and he no longer teaches them in the book, but he explains the idea because many students are nervous about their 401(k)s.
Key ideas
- Heavy disclaimer first. Value investors don't normally enter and exit the market on signals, past success doesn't guarantee future results, and the tools are "dangerous". He says explicitly that you don't need them if you invest the Rule #1 way. [01:00–03:30, 19:30–20:30]
- Fundamental vs technical. Fundamental indicators (Buffett indicator, Shiller PE, interest rates) deal with real prices and earnings. Technical ones look only at the price (and volume) of a stock or index. [03:00–07:00]
- An indicator isn't a fact. Hoof prints show a horse went by, but not that it didn't turn around. A Shiller PE of 32 suggests poor future returns but guarantees nothing. [05:00–06:30]
- Which "market"? The Dow (30 stocks, tracked by the ETF DIA) and S&P 500 (500 stocks, ETF SPY). [06:00–08:00]
- Moving average. The average closing price over a window (say 30 days), recalculated each period so the line smooths out noise. Danielle and Phil work out the difference between the length of the window and the plotting period. Common windows: 10, 30, 50, 200. [08:00–15:00]
- Crossovers. When a shorter average (50 day) crosses a longer one (200 day), many traders read it as a change of direction. Phil says he uses something similar but different. [12:30–15:00]
- Why they exist. Traders trade in minutes to weeks, so fundamentals are too slow to help. Phil estimates there are over a hundred of these tools. [15:00–16:00]
- How his own view changed. In Rule #1 he said these could be used on a good, underpriced company to enter and exit, with a warning about "death by a thousand cuts" in downtrends; in the second book he backed away; in Invested he left them out. Teaching since 2008 taught him they work for him, but not necessarily for students. The workshop still covers three. [16:00–19:30]
- Who they're for. People nervous about a 401(k) or IRA full of index funds, with too little time to wait out a 50% drop. If you have plenty of money, stay put or ask an advisor. [20:30–24:00]
- The three tools, briefly. Moving average ("psychology"), MACD or moving average convergence divergence ("momentum"), and the stochastic ("contrarian", shows overbought and oversold). Details are saved for next time. [24:00–28:00]
- Clouds. Phil's argument: if most traders see a train in the cloud and bet on it, it matters that they see a train. Danielle says she disagrees. [28:00–30:00]
How it maps to RuleOne
- Nothing here is part of the screen or the agent stack. Technical signals are explicitly not Rule #1 investing and RuleOne doesn't use them.
- If you want to see the idea, a price chart with a 50 and 200 day average could be added as context; treat that as a possible feature, not a current one.
- The event watch (a real drawdown on a business you understand) is a fundamentals-based alternative to timing.
Buffett, Munger and Graham links
- Buffett and Munger don't use charts. Graham's remarks on market fluctuation in The Intelligent Investor (chapter 8, Mr. Market) take the opposite approach: ignore the price's mood and decide on value.
- Buffett famously says he'd not change a position if the Fed told him next year's rates (discussed in 158).
Words to know
- Technical indicator: a calculation from price and volume history used to predict direction.
- Moving average: the average of the last N periods, updated every period.
- MACD: moving average convergence divergence, a momentum measure from comparing moving averages.
- Stochastic: an oscillator marking overbought and oversold conditions.
Try this
Open a price chart of SPY for the last 2 years and draw a 50-day and 200-day moving average. Note how often they crossed and what the market did afterwards. Write one sentence on whether you'd have made or lost money following them.
Check yourself
- What is the difference between a fundamental and a technical indicator?
Answer
Fundamental ones use real values like earnings, GDP and rates; technical ones use only price and volume history. - What does a 30-day moving average do to a noisy price?
Answer
It averages the last 30 days, smoothing day-to-day jumps into a clearer trend. - Why did Phil drop technical indicators from his later books?
Answer
He found they may have just worked for him and could be dangerous for students.
Short quotes
"These are not widely used in the value investing community. These are more trading tools." (Phil, ~02:30, auto-transcribed)