**Summary of Cam Harvey’s investing Q&A**
- **Index funds vs. individual stocks** – Low‑cost index/ETF funds give diversification and are the easiest, most sensible core holding for most investors. A small “satellite” allocation (≈5‑10 % of the portfolio) can be used to pick individual stocks for learning, fun, and performance tracking, but only after doing the work.
- **Gold** – Acts as a safe‑haven in turmoil, but its volatility is comparable to the S&P 500; it’s not a free‑lunch investment.
- **Geographic allocation** – Because U.S. stocks represent ~50 % of global market value while the U.S. is only ~15 % of world GDP, a balanced split (≈50 % U.S., 50 % international) provides better diversification.
- **AI boom** – Unlike the 1990s internet bubble, AI’s impact is broader (affects every company), involves self‑disruption (firms willingly cannibalize old businesses), and is backed by strong current earnings, making a burst less likely (though a correction is possible).
- **P/E ratio** – Price‑to‑earnings compares price to past or expected earnings. A high P/E relative to history often signals overvaluation and a likely reversion; a low P/E can indicate distress rather than cheapness. It’s a useful valuation gauge for both the market and individual stocks.
- **AI tools in investing** – Only large institutional managers with dedicated AI/ML teams use them effectively; retail investors should first understand how any tool works before relying on it.
- **Long‑term market return** – The S&P 500’s historical average ≈7 % per year (≈5 % real return + 2 % inflation). Achieving this requires staying invested through downturns; trying to time the market usually hurts performance.
- **Crypto exposure** – Treat crypto as a speculative slice: limit to roughly 2‑4 % of the portfolio, be aware of extreme volatility, and avoid large allocations.
- **Beginner mistake** – The most common error is buying high and selling low (chasing performance). The disciplined approach is to buy low, sell high, and avoid emotional reactions.
- **Brokerage choice** – Low‑cost, no‑frills brokers (e.g., Robinhood, Schwab) suit beginners and cost‑sensitive investors. Older or advice‑seeking investors may prefer full‑service brokers that charge higher fees but provide planning, legal, and estate services.
- **Research process for a stock** –
1. Follow news and company releases (press releases, SEC filings).
2. Review analyst coverage.
3. Listen to unscripted quarterly earnings calls.
4. Examine fundamentals (earnings, cash flow, balance sheet).
5. If the price has risen sharply, consider waiting for a correction before buying.
- **Private equity / non‑public investing** – Generally limited to accredited (qualified) investors; the current system excludes many knowledgeable, non‑wealthy individuals from opportunities like SpaceX. Reform (e.g., a qualification test) could broaden access.
- **Meme coins** – Extremely volatile (10‑100× stock‑market volatility) with no fundamental value; most investors lose money, though occasional lucky spikes occur. Treat them as a high‑risk lottery, not an investment.
- **Stock options** – Give employees the right to buy company stock at a set price in the future. They align incentives (employees benefit if the stock rises) and help retain talent while conserving cash.
- **Insider trading** – Illegal and unethical when based on material non‑public information. Public commentary, TV pundits, or forum advice is permissible; only trading on true inside information is prohibited.
- **Day trading** – Very difficult for retail investors because they compete against high‑frequency traders and hedge funds with superior technology, data, and capital. Not recommended for most.
- **Hedge funds** – Common equity hedge funds hold long positions in expected winners and short positions in expected losers, making the portfolio largely market‑neutral (profits from relative performance rather than overall market moves). This structure aims to reduce exposure to broad market swings.
1. Cam Harvey is a professor of finance at Duke University.
2. He is answering questions submitted by internet users.
3. A Reddit user asks why not everyone just sticks with an index fund.
4. Harvey says it is difficult for an individual investor to pick stocks.
5. Picking stocks requires a lot of effort and time.
6. Individual investors often lack access to necessary data.
7. For most investors the easiest approach is to invest in a low‑cost exchange‑traded fund or index fund.
8. Such funds provide diversification.
9. Investors do not need to worry about individual stock selection when using these funds.
10. Civil Employee 4736 asks whether holding individual stocks is worth the stress.
11. Harvey says holding only a few stocks is stressful and not advised.
12. He recommends allocating about 10 % of a portfolio to individual stocks that the investor researches.
13. This practice can provide learning opportunities.
14. Investors should keep a track record of their individual‑stock picks.
15. Harvey notes that picking individual stocks can be fun.
16. KillerG asks why many call gold a bad investment despite its returns.
17. Harvey states gold is the oldest investment in history and has been held for millennia.
18. Gold has safe‑haven status and tends to hold its value during market or economic turmoil.
19. He also says gold is about as volatile as the S&P 500.
20. Garth Ferguson 69 asks how to invest $20,000 today.
21. Harvey advises putting most of the money into a diversified equity portfolio that includes U.S. and international stocks.
22. He suggests allocating a smaller portion to a money‑market fund to capture the highest yield.
23. He recommends holding out 5 %–10 % of the portfolio to invest in stocks that have been researched.
24. The investor should follow those stocks, collect information, and make the investments.
25. This process helps the investor learn about valuation and measure performance of their picks.
26. Fire Tyrant asks about international allocation in a portfolio.
27. Harvey observes that most investors have insufficient international exposure and their portfolios are dominated by U.S. stocks.
28. Historically U.S. stocks have performed well.
29. U.S. stocks represent about 50 % of the total world stock market value.
30. The United States accounts for only about 15 % of world GDP.
31. Harvey concludes it is sensible to diversify outside the United States.
32. He gives a simple answer of 50 % international and 50 % U.S. allocation.
33. All of us 82 asks about the AI bubble and its possible burst.
34. Harvey notes that the value of AI‑related stocks has exploded.
35. He says most of the stock‑market value created in the past year is due to AI‑related stocks.
36. He argues that today’s situation is different from the 1999 dot‑com bubble.
37. Difference 1: AI’s technological disruption is far different from the 1990s introduction of the internet.
38. The internet mainly enabled efficient information collection and socializing.
39. AI can be creative, solve problems, and has vast productivity implications.
40. Difference 2: In the late 1990s the internet affected companies differentially; AI impacts essentially every company.
41. Within a single company there can be hundreds of AI applications.
42. Difference 3: Companies today are willing to pursue self‑disruption, initiating projects that may weaken existing business lines.
43. He cites Tesla as an example, describing it as a robotics company rather than just a car maker.
44. Difference 4: In the 1990s investors bet on future earnings that were not growing much; today’s firms are massively profitable.
45. Four West of the Moon asks why the P/E ratio matters to an investor.
46. Harvey defines the P/E ratio as price divided by earnings per share.
47. A second version uses expected earnings instead of past earnings.
48. Both versions are common measures of valuation.
49. A high P/E relative to a stock’s history suggests a substantial probability the price will revert to its previous P/E.
50. Stocks with very high P/E are often called expensive; those with very low P/E are often called cheap.
51. He cautions that a low P/E can signal distress rather than cheapness.
52. The P/E is a widely used indicator of valuation for both the market and individual securities.
53. The P/E for the S&P 500 is currently very high.
54. Historically, a high market P/E has been followed by lower returns over the subsequent years.
55. A high P/E may indicate overvaluation or expensiveness, leading to a reversion to more normal levels.
56. User shanananananana asks whether people use AI tools for investing.
57. Harvey says many people use AI tools for investing.
58. A key point is to understand how any tool works.
59. Users of AI tools are typically large institutional asset managers with teams trained in artificial intelligence and machine learning.
60. These teams know exactly what the programs do, understand their implications, and fine‑tune them for large data sets.
61. Typical broccoli 325 asks if the stock market can really keep returning 7 % a year.
62. Harvey states that 7 % is the long‑term average annual return of the S&P 500.
63. Returns sometimes exceed 7 % and sometimes fall below it, reflecting volatility.
64. The stock market is a volatile investment; the 7 % figure is a longer‑term average.
65. To achieve the long‑term average return an investor must stay invested through market drawdowns.
66. The 7 % return consists of a real return plus an inflation‑compensation component.
67. Assuming 2 % inflation (the Fed’s target), the real return after inflation is about 5 %.
68. Doom Shallot asks what percentage of a portfolio should be in crypto.
69. Harvey describes crypto as a broad category.
70. One class (e.g., Bitcoin) has no backing and derives value from belief.
71. Another class (e.g., stablecoins, tokenized gold) is backed by assets such as U.S. dollars or gold.
72. He advises caution when allocating to crypto.
73. He says it is a mistake to invest a large portion of a portfolio solely in crypto.
74. He considers an allocation of 2 %–4 % reasonable, not 10 %.
75. Successful War 5671 asks about the most common investing mistake beginners repeat.
76. Harvey identifies the biggest mistake as buying high and selling low.
77. The ideal strategy is to buy low and sell high to make a profit.
78. Often investors buy after a stock’s price has risen, attaining a lofty valuation, and then face a possible correction.
79. Scrum Julio asks whether the brokerage used matters.
80. Harvey says brokerage choice matters and depends on the investor’s needs.
81. Younger investors benefit from low‑cost brokers such as Robinhood or Schwab, which offer low fees for stocks and ETFs.
82. More mature or older investors may choose higher‑fee brokers (about 0.5 %–1 % per year) that provide additional services like legal advice or estate planning.
83. Those extra services can be valuable.
84. So reason 5782 asks about Harvey’s process for researching a new stock.
85. He recommends investing most funds in a diversified index fund.
86. He also advocates keeping a portion of the portfolio for individual stocks that the investor selects.
87. Step 1: monitor news carefully, including company‑specific news from mainstream media and corporate releases.
88. Step 2: review the company’s annual report, quarterly releases, and SEC 10‑K filing.
89. Step 3: examine analyst coverage when available.
90. Step 4: listen to quarterly earnings calls where management answers unscripted questions.
91. Step 5: analyze the company’s fundamentals; a rising stock price alone is not sufficient reason to invest.
92. If the price has risen dramatically, the investor may have missed the opportunity and should exercise restraint.
93. The investor should wait for a price correction before considering a purchase.
94. Charming Jerry 8688 asks how an average investor can participate in private‑equity companies.
95. Harvey notes many exciting companies (e.g., SpaceX) are not available to the average investor.
96. Access requires qualifying as an accredited investor under U.S. rules, which includes meeting certain income or net‑worth thresholds.
97. Even knowledgeable individuals may be barred from buying non‑public (private) equity.
98. Private companies do have equity; often they later conduct an initial public offering, turning private equity into public equity.
99. He calls the current system unfortunate.
100. He gives an example of a high‑school biology teacher with a hobby in biotech who cannot invest in such private firms despite expertise.
101. Harvey suggests that qualification should be based on the ability to research and pass a test, allowing broader access.
102. User just another boy asks whether people really make money with meme coins.
103. He defines a meme coin as a cryptocurrency with no fundamental value and no backing.
104. Meme coins are traded mainly for fun, similar to trading cards.
105. They are extremely volatile—20 to 100 times more volatile than the stock market.
106. Extreme price moves up and down are common.
107. There is no evidence that a portfolio of meme coins generates profit.
108. An investor might get lucky with a single coin’s surge, but is more likely to lose the entire investment.
109. If investing in meme coins, one should be prepared to lose 100 % of the funds placed.
110. Double A plus Ron asks how stock options work.
111. Harvey explains that options give the employee the right to buy the company’s stock in the future at a set price.
112. This is a call option, typically long‑dated.
113. Example: stock trades at $90; employee receives options to buy in five years at $400.
114. If the stock later rises to $1,000, the employee can buy at $400 and sell at $1,000, gaining $600.
115. Companies use stock options to compensate and retain employees.
116. The arrangement aligns incentives: employees benefit when the stock price rises, encouraging them to work to increase value.
117. Electronic Doctor asks whether “mad money” is just insider trading.
118. Harvey defines insider trading as trading on material non‑public information, which is illegal and unethical.
119. Public information from TV, video, or the internet is permissible to use for trading decisions.
120. Using non‑public insider information to trade can lead to legal trouble.
121. Sistah Wistah asks why day trading is considered so hard.
122. Harvey says day trading involves buying and selling stocks each day to capture short‑term trends.
123. Consistently making money is difficult because the main competitors are institutional‑grade traders.
124. These competitors include hedge funds and high‑frequency traders with massive computing resources, ultra‑fast data feeds, and proprietary software.
125. Day traders effectively trade against these well‑resourced opponents and therefore rarely profit.
126. He does not recommend day trading for the average investor.
127. Jan DD126 asks what a hedge fund is and what a hedge‑fund manager does.
128. Harvey says there are many hedge‑fund styles; the most common is an equity hedge fund.
129. An equity hedge fund holds a long position in stocks it expects to win and a short position in stocks it expects to lose.
130. This differs from a simple buy‑and‑hold portfolio.
131. The short side profits when the selected stocks decline in value.
132. The fund is called a hedge fund because the long and short positions offset market‑wide movements.
133. Example: if the market falls 20 %, the long side may lose 20 % while the short side gains 30 % (if the shorted stocks fall 30 %).
134. The net result can be a positive return (e.g., +10 %) despite a market decline.
135. Such funds are relatively immune to overall market movements.