Yes DrS, you are correct. I went to 100 G because I had no IFTs left to go into equities.
I agree with Lostdawg, you must be talking about the Dow. The S&P 500 , which the TSP's C fund tracks, is actually a better indicator of the overall market because it has 500 stock market companies in it. This is why it is considered the stock market benchmark index. The Dow only has 30 companies in it and was being propped up today because of IBM. Since it only tracks 30 large companies, one or two can determine it's ultimate fate. In fact, only 8 of the 30 were up today, but since IBM was up over 3% today, the Dow didn't lose hardly anything today.
The S&P 500 is also a collection of large cap companies, but there are 500 of them so one or two companies are not going to effect the overall index like the Dow.
The Wilshire 4500, which the TSP S fund tracks, is actually an index of over 6000 mostly small and mid-sized cap companies. Because they are smaller companies, the index will be more volatile than the Dow or S&P500. Meaning on market up days, it will tend to go higher than the other 2 indexes and on down days, it will go lower.
Traders prefer to use small cap indexes like the Wilshire4500, and in particular the Russell 2000, to trade because volatility has the chance to increase gains. It'll also increase losses.
I won't even talk about the I fund because there are too many variables in it to discuss in a short time. I will say it's made up of international funds and is greatly affected by the price of the dollar.....................