I need to rollover a company 401k plan. My total investments counting the 401k plan are 95% equities and 5% bonds. I’m looking at rolling the company 401k 100% into bonds. I would like to go with just one index fund, Fidelity Spartan U.S Bond Index FD. Does that make sense or should I look at more options? After the rollover I will be around 80/20.