UPDATE 3-Australia orders external audit of credit provider Afterpay, shares tumble <!-- no image --> <div>* Shares in buy-now-pay-later firms have spiked on growth prospects<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=sHB_xz94UUs:aDGOSVOdK54:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=sHB_xz94UUs:aDGOSVOdK54:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=sHB_xz94UUs:aDGOSVOdK54:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=sHB_xz94UUs:aDGOSVOdK54:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=sHB_xz94UUs:aDGOSVOdK54:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/sHB_xz94UUs" height="1" width="1" alt=""></div> Posted by Reuters