This is not a trading method. It is 85 short chapters, each taking one Wall Street saying (buy the dips, sell in May, never catch a falling knife) and testing whether it actually holds. Most don't fully hold.
The one idea
Maiello, a Forbes reporter, works through 85 pieces of market folklore, one per short chapter, and asks the same question of each: is this actually true, or is it something brokers say to sound wise and get a client off the phone before five o'clock? The book's own framing in the introduction is that none of these sayings work every time, and the best any of them can do is work more often than not.
The chapters are grouped into six parts: broad market beliefs (don't average down, cut your losses, buy and hold), stock-picking sayings (never fall in love with a stock, never catch a falling knife), Federal Reserve rules of thumb (don't fight the Fed, the Greenspan put), what institutional money supposedly signals, calendar effects (sell in May, the January effect), and finally a section the book itself titles 'People Believe This Stuff?' covering things like the Super Bowl indicator and the theory that shrimp cocktail size predicts market returns.
There is no unifying trading system here. Each chapter stands alone, runs a page or two of history and quoted sourcing against the saying, and lands on a verdict: mostly true, mostly false, true for traders but not investors, or true in one era and dead now. The value is in the specific verdicts, not in a method a reader could apply mechanically.
What it actually teaches
The book doesn't build toward a system, but it does apply the same four-part test to every maxim it covers.
STATE THE MAXIM PLAINLY
Each chapter opens with the saying exactly as investors hear it ("Buy the Rumor, Sell the Fact," "Sell in May and Go Away") and restates what it's telling the reader to actually do.
CHECK WHO IT ACTUALLY SERVES
Maiello repeatedly separates the trader case from the investor case. On buy the rumor, sell the fact, he writes that the adage 'has more meaning for traders than for investors,' since it depends on catching a runup in a stock ahead of a scheduled event like a merger announcement, then selling into the news itself.
TEST AGAINST A NUMBER OR A NAMED SOURCE WHEN ONE EXISTS
Where data exists, the book cites it. On the Rule of 20 (market P/E plus inflation under 20 signals a fairly valued market), it cites a 1999 study by economist Glenn Tanner: $1,000 invested passively in 1935 grew to $134,000 by 1995, versus $244,000 for an investor who switched to Treasuries whenever the inflation-adjusted P/E crossed 20. On buy and hold, it cites the drop in average stock holding period from 28 months to 16 months during the 1990s, and the fact that an investor who traded 85 percent of a $1,000 position starting in 1980 would have ended 2000 with $8,100 versus $16,000 for one who did nothing, after taxes and trading costs.
GIVE A QUALIFIED VERDICT, NOT A CLEAN YES OR NO
The chapters almost never end with a flat confirm or deny. Buy the rumor, sell the fact gets a soft no for retail investors: the book concludes that in an era of SEC Regulation FD (adopted 2000), which forces companies to disclose material news to everyone at once, 'good rumors are hard to come by,' and it would be 'prudent to be wary of rumors and to invest on the merits of fact.'
What it looks like Monday morning
A reader won't come away with a new strategy to run. What changes is how they hear their broker, their uncle, or financial TV. The next time someone says 'buy the rumor, sell the fact' about a pending acquisition, the reader now knows the mechanism the phrase is describing (a pre-announcement runup that reverses on the actual news) and the specific reason it is harder to act on today than it used to be: Reg FD has choked off the selective leaks the strategy depends on.
The more durable habit the book pushes is treating every market aphorism as a claim to be checked against a source or a number, not repeated on faith. That's a useful discipline to apply generally, but this book supplies the checking for its own 85 sayings and stops there. It does not hand the reader a way to test the next maxim someone throws at them.
None of these myths will work every time and the best they can do is work more often than not.Michael Maiello, Buy the Rumor, Sell the Fact
Where it fails
- It is not a method book despite the trading-book shelf placement. There is no entry, exit, sizing, or risk rule anywhere in it. Each chapter is a short essay verdict on a saying. A reader looking for something to actually trade will find nothing executable; the book explicitly positions itself as a guide to interpreting brokers and financial media, not a strategy.
- The Reg FD dependency has moved further, not stayed put. The buy the rumor, sell the fact chapter leans on Regulation Fair Disclosure (2000) as the reason rumor-trading has gotten harder since the book's 2004 publication. Two decades of further disclosure enforcement, faster news dissemination, and algorithmic trading on headline scrapes have compressed the rumor-to-news window even more than the book anticipated, so the chapter's already-soft case for the maxim is weaker now than when it was written.
- Some of its own evidence is timing-biased, and the book says so. In the Rule of 20 chapter, Maiello notes that Glenn Tanner's supporting study began during 1995 (market at 22 times earnings) and was published in 1999 with the market at 33 times earnings, meaning the study's own window happened to sit inside a historic bull run. The book flags the bias but still uses the study as its main evidence for the maxim, which undercuts the verdict it hands the reader.
- No worked examples with actual trade mechanics. Every number in the book is a historical statistic (holding periods, hypothetical portfolio growth, tax rates) rather than a step-by-step trade the reader could replicate. A reader hoping to see an example of, say, a stop-loss placed on a short position (a maxim the book covers) will get a paragraph of reasoning, not a number.
- Sourcing leans on quoted professionals rather than the underlying data. Several verdicts rest on a single named source, such as Wrightson ICAP economist Lou Cranston's comment on stock-bond correlation regimes. That's one person's read of history, presented without the correlation data itself, so the reader has no way to check the claim independently.
- The book quietly does not work for a reader who already knows the material. Anyone who has read a standard behavioral-finance or market-history text will already know most of these debunkings (that buy-and-hold beats frequent trading after taxes, that P/E-based market timing is unreliable out of sample). The book's audience is someone new enough to investing to still be hearing these phrases seriously.
Who it is for
Buy it if
You are new to investing and keep hearing phrases from a broker, a relative, or financial TV that you can't evaluate, and you want a quick, skeptical translation of what each one actually means and how often it holds. It also works as a light, readable primer on market history and behavioral finance basics.
Skip it if
You are looking for a trading system, entry and exit rules, or backtestable numbers. You will find none. Anyone who already treats market aphorisms with skepticism, or who has read a standard behavioral finance book, will find little new here.
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