The number of federal workers in the Lifecycle funds is small now, but will grow to a significant force in future years. This will especially be true when the L funds become the default investment vehicle for new workers. By not tracking trades in the L funds, we are making a statement that passive, infrequent, TSP investors need not apply at TSPTalk. I believe this will be a mistake we regret in the future years.
By not recording L fund prices in the new TSPTalk database, we will not have the data to generate L fund return performance over any period. There will be no comparison with member returns, or the L fund returns will have to calculated and added manually to reports. Not recording the L fund prices in the database, or leaving room in design, will make any future upgrade to include L funds more difficult.
The Lifecycle funds are part of the TSP system and like their underlying funds can be traded like any other TSP fund. The TSP governing body does not restrict trading the L funds. I move money into and out of these funds at times when I want to have something in the market, yet I don't know what fund is best. It makes the job easier moving 50% L2020 and 50% G, rather than all five G, F, C, S, and I. It makes life uncomplicated for members who are retired, conservative, or infrequent traders. The argument that the L funds are not meant to be traded can also be made for any of the TSP funds. The TSP board perpetuates the same myth for all TSP funds. I hear the same bunk from Vanguard on all their mutual funds. But Vanguard has frequent trade policies in place that slows you down.