FTSE 100 Index changes – effect on share price of companies leaving the index

FTSE 100 Index quarterly reviews

The following charts show the share price of six companies that have left the FTSE 100 Index (in the years 2012-2013). The time period for each chart is six months, starting from three months before the company left the index. The dashed vertical line shows the date it was announced the company was leaving the index.

So the charts show the share price behaviour in the three months leading up to leaving, and the three months after.

Review changes are implemented at close on the third Friday of the month of the review. (Further information on the FTSE 100 Index quarterly reviews.)

The effect is not as strong as that for companies joining the index, but generally share prices fall (sometimes quite steeply) in the three months leading up to the index change announcement, and then shares bounce back quite sharply immediately afterwards.

FTSE 100 Index change - company leaving index (LMI)

FTSE 100 Index change - company leaving index (ESSR)FTSE 100 Index change - company leaving index (EMG)FTSE 100 Index change - company leaving index (ASHM)FTSE 100 Index change - company leaving index (PNN)FTSE 100 Index change - company leaving index (INTU)


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