With the Singapore Exchange's (SGX) $10.7 billion take-over of ASX looking more uncertain, shares of SGX floated higher yesterday while ASX shares continued to tumble. Instead of taking an openly protectionist tack, some quarters in the Australian political scene are using the ?moral stick? to attack Singapore. ?We notice that the protectionist sentiments and the xenophobic concerns are thus far well-hidden,? Assistant Professor Eugene Tan told BT.