GLOBAL MARKETS-Asia cautious as U.S. riots weigh on S&P futures
* Asian stock markets : tmsnrt.rs/2zpUAr4
* S&P 500 futures slip as riots add to economic woe
* Asia markets hold steady for the moment
* Busy week sees ECB meet, U.S. payrolls report
By Wayne Cole
SYDNEY, June 1 (Reuters) - Asian share markets started on a cautious note and gold gained on Monday as images of riots in burning U.S. cities unnerved investors already tense over Washington’s power struggle with Beijing.
E-Mini futures for the S&P 500 retr...