US stock futures wavered on Wednesday after a record-setting session for the Dow as investors fielded the latest wave of earnings in a busy day highlighted by Tesla (TSLA) and IBM (IBM). The Dow Jones Industrial Average (^DJI) and the S&P 500 (^GSPC) were little changed. The tech-heavy Nasdaq Composite (^IXIC) was down around 0.2% as stocks swung between small gains and losses. Wall Street is looking to earnings to lift spirits after upbeat blue-chip results on Tuesday helped propel the Dow (^DJI) to a ...