The Australian share market is trading flat after heavy selling on Wall Street and global growth concerns. The S&P/ASX200 and All Ordinaries are slightly lower, following a tech-led sell-off in the US and a downgrade in US growth forecast by Fitch Ratings. Gold prices have reached new highs as investors seek safe havens. Energy, materials, financials, and healthcare stocks are trading higher, while utilities, consumer staples, and communications stocks are down. The big four banks are mixed, with NAB leading the way. The Australian dollar has also lost ground against the US dollar.