The ASX200 has been up 0.34% at 8,234 points. The local bourse is tracking towards its highest close in four days. Big banks and miners are leading the market higher. Westpac (ASX:WBC) has been up 0.8% and Rio Tinto (ASX:RIO) has been up 1.2%. IT has been the best performing sector, up 1.2%, followed by Health Care 0.9% and Utilities, up 0.5%. Staples has been the biggest loser, down 0.7%, followed by Industrials, down 0.4%. Company NewsAfter a rollercoaster week, Wisetech Global (ASX:WTC) has been up 13.6% at $112.91. Bell Potter upgraded their rating on the stock to Buy and revised its price…