401K diversification

[lynnerself]

My 401k recently added two new funds. One is a REIT and the other is energy stocks. In general I try to stay as diversified as possible in the 401K. Currently I am 20% each of bonds, international, small, mid and large cap stocks.
I would like to add some of the two new funds to the mix, but not sure how or in what ratios.
Do I re balance it all with the new funds included? Or just start purchasing them. I'm particularly worried about the energy fund. As much as I would like to have some as a part of the portfolio, this seems like a horrible time to buy in.
Any suggestions?

[Deleted]

If you believe in index fund investing then you already know that you can't time the markets. Yes oil is higher but not as high as it was back in Aug 2008. We only own 2 energy stocks but do receive oil royality income. Those checks are still only about 3/5th of what they were in 2008. While there's a lot we don't know I do feel comfortable in predicting that the political situation in oil producing countries will likely remain unstable and that there's no cheap substitute for oil in the forseeable future.

So don't worry about timing the market.

More importantly is asking yourself whether you want to own these new funds and at what %? Perhaps 5% and 5% of your portfolio? If so then I would look at what it would take to reach those % by the end of the year (or whenever you typically rebalance). When I wanted to invest in an international funds back in 1998 ish I didn't sell my existing balances. I just changed my investment selection to be 100% of the international funds until I was at the correct over all balance. I left that job and so never changed that allocation back but that would have been my goal.