Q: I will be rebalancing my portfolio biannually to the initial allocation until I reach an age that justifies a change to a more conservative approach. To complete this action, do I process both an interfund transfer and a contribution allocation? Is biannually OK? A: You’re asking for specific, individual investment advice, which I can’t provide through this forum. In general, I recommend that Thrift Savings Plan investors using this do-it-yourself strategy set the contribution allocation to 100 percent G Fund and then periodically rebalance the existing assets to their selected allocation. I recommend that you rebalance no more frequently…