South Africa's rand touched a fresh 14-year low against the dollar on Wednesday amid concerns about the ailing local economy and after a US Federal Reserve official backed a US rate hike next month. Investors are worried that growth in Africa's most advanced economy has remained subdued since a 2009 recession with output seen below 2 percent this year, partly due to the worst electricity crisis in seven years.The economic development minister said on Wednesday that the key mining sector, which accounts for about 7 percent of GDP, was in "trouble" as it struggled with widespread job losses and lower commodity prices.The rand hit a session low of 12.7725, its weakest since December 2001 according to Thomson Reuters data. The local unit was trading at 12.7580 by 0631 GMT, down 0.1 percent from Tuesday's close.The move partly reflected a stronger dollar after a U.S. Fed official expressed support for an interest rate hike in September."The rand's upward assault on 12.80 continues, albeit at a far more measured pace than last week," Rand Merchant Bank's John Cairns said in a note."Movements are indicative of dulled investor sentiment toward the broader emerging market complex as evidenced by the continued weakness in the rand's commodity-linked peers."South African government bonds were also sold in early trade, with the 2026 benchmark yielding 5.5 basis points higher at 8.275 percent...