HONG KONG (AFX-ASIA) – Cheung Kong Infrastructure Holdings Ltd said its six months to June net profit fell to HK$1.491 billion from HK$1.509 billion a year earlier, mainly due to lower extraordinary income compared with last year’s one-off gains from the sale of the retail business of Powercor Australia Ltd. (US$1=HK$7.87). Analysts polled by AFX-ASIA…