Relative Strength, 1 Year

What is the definition of RS 1y?

1 year Relative Strength measures a stock's price change over the last year relative to the price change of a market index. It shows the relative outperformance or underperformance of the stock in that timeframe. Different benchmarks are used for different geographic markets which can be reviewed here.

It is calculated dividing the price change of a stock by the price change of the index for the same time period. e.g. A stock falling by 20% versus an index rising 20% would lead to a Relative strength calculation of 100 * ( 80/120 - 1) = -33%

Stockopedia explains RS 1y...

Research indicates that relative strength is a negative signal in the near-term but generally a positive indicator in the medium (6-24 months).

A study by Hancock found a momentum-based strategy outperformed a broad universe of U.S. stocks by nearly 4% per year from 1927-2009. Research has shown that momentum is particularly beneficial when combined with a value style because the two are negatively correlated. Moskowitz and Grinblatt conclude that "A value-momentum combination mitigates the extreme negative return episodes a value investor will face (e.g., the tech boom of the late 1990s and early 2000 or a dismal year like 2008)"

However, momentum-based strategies have been shown to suffer badly during times of extreme market volatility such as the 2008/09 crisis.

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