Due to a sharp decline in stock prices, British luxury goods group Burberry is set to exit the FTSE 100 Index, potentially ending its 15-year presence in the UK blue-chip ranking. The final changes to the index will be announced after the European market close on September 4. Over the past three months, Burberry’s stock has dropped by a third due to a slowdown in industry demand and setbacks in brand reform. Before Tuesday’s quarterly announcement of the preliminary index changes, Burberry’s market capitalization was 2.5 billion British pounds, ranking 140th in the FTSE 350 Index of large and mid-sized UK companies, well below the position needed to remain in the FTSE 100 Index.