Very OT: Did you get out of BRK.A / BRK.A?
Still in BRK. But I've been incrementally selling it.
I think Warren Buffett is making bad stock investment choices (Wells Fargo, airlines, Phillips 66) -- but I do think BRK is basically honest; they have an unbelievably/ridiculously good insurance business; and an excellent railroad; and a utility (Mid-American) which is really aggressively adopting wind. Given that, I'm loathe to get out completely. These positions are mostly taxable, and mostly old (one share is 22 years old), so the bite from capital gains tax is significant and there's a strong incentive to let them sit.
TSLA probably will do enough better than BRK to more than make up for the capital gains bite, but I'm now at my chosen concentration limit for investing in TSLA. I have a concentration limit because I live off my investments; I need to be able to continue to access cash for living expenses / medical emergencies / unexpected house repairs / etc., and for that it's better to have something to sell which is much less volatile than TSLA. Despite my rubbishing of conventional "buy 500 stocks" diversification, I still do think a small amount of diversification is a good idea (small enough that you still have time to analyze each stock).
Of the assets I am managing (after subtracting cash reserved for taxes which will be owed in April 2018, which is 5% of the portfolio), TSLA's now up to 28%, with BRK down to 21% (used to be over 30%). 26% is in retirement accounts which cannot be invested in individual stocks (and is basically in real estate funds). Cash net of taxes owed next April is 8%, most of which is securing TSLA short puts. The cash reserved for taxes payable in April 2018 is also securing TSLA short puts (so if TSLA really drops I will be VERY heavily invested and will have to sell something else, probably BRK, to pay taxes). 9% is in another short-term single stock bet which I do not wish to disclose.
There's about 6% in three stocks which I liked but which went above the price where I was comfortable buying before I bought very much (but are below the price where I'd definitely sell them) and about 2% in two stocks which I plan to sell but which I think I can get a better price for. I probably would rotate out of these into TSLA if I didn't feel sufficiently concentrated in TSLA already.
That should give some perspective on how concentrated I am.