Now that the I fund has such a run-up, most of the tech analysis will likely indicate that it is too hot and has gone to far, so there must be an impending correction in the offing.
However, should this be a lengthy climb due to a falling dollar, this may over-ride analylists rational. Now, we have to decide what rational and strategy will be dominant over the near to mid term.
I am sticking with the I fund at the moment, especially since the EAFE seems to have a long way to go before it is likely to run out of steam.
Also, to me, the S and C funds don't seem to hold as much promise in the same time frame.
The F fund will not be an option for me unless interest rates drop while the economy tanks at the same time. Don't see the rates dropping enough to stimulate the F at this time.