1 The Story
The man who let the bands breathe
In the early 1980s, while trading options and focused on volatility, John Bollinger replaced the era's fixed-width trading bands with bands that widen and contract with the market itself.
Born in 1950, Bollinger became an independent trader in 1980 and joined the Financial News Network, where he was Chief Market Analyst from 1984–1990. He founded Bollinger Capital Management, wrote Bollinger on Bollinger Bands (2001, translated into eleven languages), and was the first analyst to hold both the CFA and CMT designations. He also coined the term "Rational Analysis" for blending technical and fundamental views.1
2 The Big Idea
Make the bands adapt to volatility
His insight was simple and durable
Plot bands a number of standard deviations above and below a moving average, so they widen in volatile markets and narrow in quiet ones.
That single change — using standard deviation instead of a fixed width — turned static channels into a dynamic, self-adjusting volatility envelope.1
3 The Method & Contribution
What Bollinger Bands measure
Standard-deviation bands
An upper and lower band set k standard deviations from a moving-average middle line — typically 20-period, 2 SD.1
The squeeze
When volatility falls, the bands contract — a "squeeze" that often precedes an expansion in range.1
Relative, not absolute
Bands describe whether price is high or low relative to recent volatility — not a guaranteed buy or sell.1
Rational Analysis
His broader philosophy: combine technical and fundamental evidence rather than treating them as rivals.1
4 See It On This Site
Bollinger Bands, explained on this site
Go deeper
Our Bollinger Bands deep dive covers the construction, the squeeze, the common misuses, and the honest evidence on what the bands can and can't tell you.
5 In Their Words
The idea, in brief
"Let's call them Bollinger Bands."— John Bollinger, naming the bands live on the Financial News Network when an interviewer asked what they were.1
A documented on-air anecdote, widely reported.
6 The Work
His key contribution in print
Bollinger on Bollinger Bands
McGraw-Hill · 2001- The definitive reference on the bands, written by their creator.
- Translated into eleven languages; introduces his "Rational Analysis" framework.
7 Read More
Go deeper
- CONCEPTBollinger Bands — the definitive guide.
- READBollingerBands.com — his official site.
- READJohn Bollinger — biography.
§ Sources
- John Bollinger — biography, credentials & the origin of the bands — Wikipedia; BollingerBands.com.