US stock index futures dipped on Monday as investors halted ahead of critical economic indicators later this week to take stock of what was set to be a record-setting month for the benchmark S&P 500.Data behemoth S&P Global Inc dipped 1.6% in premarket trading as it revealed a $44 billion deal to buy IHS Markit Ltd. IHS shares climbed roughly 7%. Wall Street’s major indexes were set to end the month up more than 10% as investors bet that progress in the development of a coronavirus vaccine would power a swift economic jump next year. Prospects of smooth handover of fuel to President-elect Joe Biden after weeks of legal challenges accumulated by incumbent President Donald Trump have also aided the stock-market rally.