U.S. stock index futures slipped on Tuesday, pointing to a slight easing from record highs for Wall Street indexes as investors took to caution ahead of the Federal Reserve’s widely expected move to start tapering its monthly bond purchases. Major Wall Street lenders Bank of America Corp., Wells Fargo & Co., Goldman Sachs, Citigroup, and Morgan Stanley slipped between 0.4 percent and 0.6 percent in premarket trading. Tesla Inc. fell 5.2 percent to weigh the most on futures tracking the Nasdaq index. Shares of the electric car maker closed at a record high on Monday and has gained nearly 18.8 percent in the last five trading sessions since the company’s market value crossed $1 trillion last week. After Australia’s central bank on Tuesday abandoned an ultra-low target for bond yields, opening the door for an earlier hike in cash rates, the spotlight now turns towards the Fed’s policy meeting starting …