Tidjane Thiam an executive director, sitting on the plc board. In January 2007, after Richard Harvey announced he would step down as chief executive of Aviva, Thiam was tipped as a possible future head of the group. Thiam left Aviva in September 2007 to become chief financial officer of Prudential plc. In March 2009, Thiam was named chief executive, effective from October, after Mark Tucker chose to step down. The appointment made him the first African to lead a FTSE 100 listed company. His departure from the role was announced on 10 March 2015. After he became chief executive, Prudential launched a
FTSE China A50 Index Exchange, see SZSE 100 Index. FTSE China A50 Index FTSE China A50 Index (was known as FTSE–Xinhua China A50 Index) is a stock market index by FTSE Group (FTSE–Xinhua joint venture until 2010), the components were chosen from Shanghai Stock Exchange and Shenzhen Stock Exchange, which issue A-share; B-share (share for foreigners) were not included . Other similar product were CSI 300 Index (and the sub-index CSI 100) by China Securities Index Company and "Dow Jones China 88 Index" by S&P Dow Jones Indices. For top 50 companies in the Shanghai Stock Exchange, see SSE 50 Index, For top 100