(July 28): Magnus Bocker, the former chief executive officer at Singapore Exchange and president of Nasdaq OMX Group Inc., has died of cancer. He was 55.

“We will remember him for his infectious optimism, fresh insights, and energetic approach to just about anything, from music to cars to the exchange business and his belief in SGX,” Singapore Exchange said in a statement Friday. He was a driving force for change, the company said.

Bocker started at OMX AB in 1986 after receiving a degree in business from the University of Stockholm. He was made CEO of the Swedish exchange operator in 2003, taking over after two years of losses following a failed bid for London Stock Exchange Group Plc in 2000.