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The UK Stock Market Almanac 2016: Seasonality analysis and studies of market anomalies to give you an edge in the year ahead by Stephen Eckett

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FTSE 100 reviews – companies joining the index

The charts below show the share prices of nine companies that have recently joined the FTSE 100. The time period for each chart is six months, starting from three months before the company joined the index. The vertical line in each chart indicates the announcement date of the company joining the index.

Observation

It can be seen that in most cases the share price rises for several weeks before the announcement of the company joining the FTSE 100. While afterwards the price is often flat or falls back again.

March

48, 0.1, 2.2

Week 10

Mon 7

100th anniversary of the founding ...

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