Provided by Dow Jones By James Willhite Here's what we're watching ahead of Friday's opening bell. -- U.S. stock futures edged lower as some investors grew concerned that President-elect Joe Biden's $1.9 trillion Covid-19 relief plan could lead to higher taxes. Futures tied to the S&P 500 fell 0.4%, putting the benchmark on course to decline for a second day. Contracts tied to the Nasdaq-100 edged less than 0.2% lower and those linked to the Dow Jones Industrial Average slipped 0.4%. Read our full market wrap here. What's Coming Up -- Corporate earnings season kicks into high gear with updates due before the bell from Citigroup and Wells Fargo.