(ShareCast News) - City sources predict the FTSE 100 will open 25 points lower than Monday's close of 6,688.62. Overnight markets were mixed with the US down and Asia up, but Europe has followed the US, London Capital Group night editor Jonathan Sudaria said."Gains in Asia, and in particular China, are being shrugged off as markets put it down to more politburo meddling and instead focusing on the weak picture in the US," Sudaria said.The latest UK construction PMI will be released his morning, and OANDA market analyst Craig Erlam said it is expected to rise to 58.6 from 58.1.Stocks to watchBuilding materials group Travis Perkins posted robust first-half results in the face of continued wobbles in the plumbing and heating market. Revenues were 7.8% more than the same period last year at £2.94bn, with operating profits rising 9% to £182m before including profits from property sales, all in line with expectations.RBS shares were sold to institutional investors at a 2.5% discount to Monday's closing price of 337.6p. The 630m shares sold raised around £2.08bn. Chancellor of the Exchequer George Osborne hailed it as an "important first step."Engineering company Meggitt posted a 6% rise in first-half pre-tax profit as stronger-than-expected military revenue offset challenging conditions in the energy market. It also announced two contract wins on Tuesday. Meggitt was awarded a $42.1m contract by Lockheed Martin UK to produce ammunition handling systems and £10.2m in contracts from the UK Ministry of Defence.In the pressGlaxoSmithKline has rehired a former senior Chinese employee suspected of being the whistleblower behind bribery allegations that led to a £297m fine for the drugmaker in China. - The Financial TimesHSBC could still leave the UK despite tax changes designed to make London a more welcome home for the bank, its chairman and finance director said, as they consider moving the giant bank's headquarters to Asia. The bank will make a decision on its domicile by the end of the year, chairman Douglas Flint reaffirmed, after announcing the review in April. - The Telegraph.Homes in the majority of places in England and Wales are now more affordable than they were in 1997 thanks to falling inflation, low interest rates and rising wages. For the average householder their ability to buy a home has improved over the last 18 years, according to research from Hamptons International. - The Telegraph