Welcome to the Trading Day blog for Friday, January 19. ASX 200 to track US gains. Whitehaven exploring 20 per cent stake sale to US steel producers after mine buyout deal with BHP completes in April. NT EPA nod to Santos' Barossa pipeline. Michael Hill's sales lose shine. ASX 200 futures are 0.9 per cent higher at 7387 points after US markets closed. On Wall Street, tech index Nasdaq rose 1.4 per cent higher, the S&P 500 index closed up 0.9 per cent and the Dow Jones gained 0.5 per cent.