Bob Farrell wrote these 10 rules after spending more than 50 years on Wall Street. He is dead today but his rules still apply, even in the current bull market euphoria.
- Markets tend to return to the mean over time.
- Excesses in one direction will lead to an excess in the other direction
- There are no new eras — excesses are never permanent
- Exponential rapidly rising or falling markets usually go further than you think, but they do not correct by going sideways
- The public buys the most at the top and the least at the bottom
- Fear and greed are stronger than long-term resolve
- Markets are strongest when they are broad and weakest when they narrow to a handful of blue-chip names
- Bear markets have three stages — sharp down, reflexive rebound and a drawn-out fundamental downtrend
- When all the experts and forecasts agree — something else is going to happen
- Bull markets are more fun than bear markets
Hat tip to Lance Roberts at Real Investment Advice.

Colin Twiggs is a former investment banker with almost 40 years of experience in financial markets. He co-founded Incredible Charts and writes the popular Trading Diary and Patient Investor newsletters.
Using a top-down approach, Colin identifies key macro trends in the global economy before evaluating selected opportunities using a combination of fundamental and technical analysis.
Focusing on interest rates and financial market liquidity as primary drivers of the economic cycle, he warned of the 2008/2009 and 2020 bear markets well ahead of actual events.
He founded PVT Capital (AFSL No. 546090) in May 2023, which offers investment strategy and advice to wholesale clients.