different between prediction vs predictability

English

Borrowed from Latin praedictio, praedictionis; equivalent to predict +? -ion. Equivalent to Germanic forespeaking, foretale, foretelling.

prediction (plural predictions)

A statement of what will happen in the future.
"It's tough to make predictions, especially about the future." Yogi Berra or Robert Storm Petersen (in translation from Danish)
A probability estimation based on statistical methods.

(statement about the future): forecast, foretale, foretelling, halseny, prognosis, prognostication

predict +? -ability

predictability (plural predictabilities)

The characteristic of being predictable.
- There are several ways to approach predictability. One way is to investigate whether asset prices over the past few days or weeks can be used to predict tomorrow’s price. The answer is no. Following a large amount of careful statistical work by Fama in the 1960s, researchers now agree that past prices are of very little use in predicting returns over the immediate future. [...] An implication of the excessive swings in stock prices is that a high ratio of price relative to dividends in one year will tend to be followed by a fall in prices relative to dividends over subsequent years, and vice versa. This means that returns follow a predictable pattern in the longer run. Shiller and his collaborators demonstrated such predictability in stock markets as well as bond markets, and other researchers have later confirmed this finding in many other markets.

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