It appears that at least in 2017 they have been a very large cap fund.
It also suggests they are a Buy/Hold type of manager. Relatively low annual expenses compared to managed funds, but not as cheap as something large cap from Vanguard.
A quick review shows RSP equal weight seems to be a bit more volatile in bearish markets but out-performs during more bullish periods. Overall maybe a higher BETA.
30 original stocks, just bought and held since 1935. Now down to the low 20's (large chunk in BRK-A holdings and even larger in XOM (around a third of the portfolio value combined)).
So some periodic capital gains as it transforms (its more of a trust that a managed fund), but potentially years between such changes. Along with dividend taxation as well.
With initial equal weighting bought and held typically a few will be terrible and maybe even fail, most will underperform the average, a few do incredibly well. A capital gain risk factor is that one of the few that have done incredibly well being taken over or whatever, that generates a capital gains tax event. So whilst regular capital gains might be low/zero, there is a risk that a strong performing stock that is relatively heavily weighted could for instance be taken private and sold by the fund, generating a sizeable capital gain event.
Can't believe someone is talking about LEXCX! I've followed that tiny little-known fund for years.
LEXCX is more proof of the axiom that "The More You Trade The More You Lose." I pretty much invest the same way. Usually only sell losers to harvest a tax loss. Only sell winners when they become too large in my portfolio, threatening diversification. My oldest stock holding is about 30 years old.