The major U.S. index futures are currently pointing to a mixed open on Friday, with the major averages likely to once again move in opposite directions. While the Nasdaq 100 futures are down by 0.5 percent, the Dow futures are up by 0.2 percent.A slump by shares of Broadcom (AVGO) may weigh on the Nasdaq, as the chipmaker is tumbling by 5.4 percent in pre-market trading.Broadcom is under pressure despite reporting better than expected fiscal fourth quarter results and providing upbeat guidance for the curr ...