If you are looking at "shares", then you must consider the other factors that neccessarily are share related. Along with quantity, you must also consider value. More shares with less value (along with price) does not equal greater gain. In TSP, shares are an illussion, that is to say, just an expression of the dollar value of your account, and a helpful way of understanding the value relationship between the funds. If you understand that the primary funds were issued at $10 per share when they started using shares, you can see what the funds have done in relationship to each other. You could make this same comparison by looking at percentage growth between the funds during a particular time period. If they removed the "shares" expression tomorrow, it would make no difference. Notice, they do not give you the option to allocate by number of shares, only by "%". And remember, the L "funds" are not funds at all... they are merely composite expressions of the GFCSI funds. They have no dynamics of their own, apart from re-allocating ever more conservatively.
What SP said.
When I first started with this thing in 97, there were three funds, G, C and F. You got a statement showing the percentages and value of these funds and the whole account. Sort of like "trust us, we're from the gubmint". At one point they created shares by dividing members holdings in each fund by 10. Anyone remember when that was? I noticed it during my long ago search of old statements but was looking for contributions and balance only so didn't document it. IIRC it was around 2003? Whenever, it did make grasping the whole thing easier for some of us.
Along the "does anyone remember" line, when did they create S, I and the L funds?
To me, using the nebulous "shares" method makes it easier to put in a spread sheet. If I owned 1000 shares of C on 11/20/08, the were worth $8,660. Today, 7/23/13, those same shares are worth $21,644. On the other hand on 3/10/09 those shares were worth $7368. Do the math however you like. Just look at the $ amounts. This market is not always going up.
Most of the very valuable spreadsheet tools here on TSP talk that have any age on them use percentages. The reason is that back in the day there was no other way to track your daily balance. I believe that is why the autotracker works the way it does. Some respect and kudos to all the old heads on the board for figuring this out.
About that L2050 Fund.
In one place on the TSP.gov site it states the allocations for L funds will be adjusted quarterly. The info sheet at
https://www.tsp.gov/PDF/formspubs/LFunds.pdf shows the Jan 13 spread as G4 F8 C43 S19 I26.
It states:
"The five L Funds were designed for the TSP by Mercer Investment Consulting,
Inc. The asset allocations are based on Mercer’s assumptions regarding future
investment returns, inflation, economic growth, and interest rates."
No info on who on the FRTIB members own what or who MIC Inc donates what to.
If you were to choose to you could split your own payday allocation to the above percentages and do an IFT to match them. Of course you would not be able to adjust it "daily" as stated in the info sheet.
I have nothing against the L funds and have advised co-workers (once they figured out how to log in) to at least move some of their G to one of the L funds while exploring options. Now I advise them that the market has been going up for a long time and they are on there own.
To all the newer members who weren't around in 08-09, you do not know the true meaning of market correction.
PO