Sorry for the personal finance related question, but it’s also about Berkshire and valuation.

I have been overweight Berkshire for many years, so I’ve been using this rally to sell some shares. I’m starting to generate some extra tax now that I’ve blown past the $250k NIT level.

My plan was to use this rally and continue to sell up to the $613k capital gains level this year, and do it again the next few years if the price level remains kind of reasonably high. This is all in a taxable account, and I’m currently at around 85% Berkshire and 15% cash/treasuries (like that’s the entire portfolio, I don’t own anything else other than some real estate. It will take me a few years to get the ratio down to something more “reasonable” like 60/40 at this rate of selling, keeping the cap gain rate at 15% (plus the 3.8% NIT).

I guess what I’m asking is, does the current price of Berkshire seem like a reasonable price to sell, or am I selling too early? It’s hard for me to sell this stock, and I don’t need the cash, but I don’t want to leave such a large concentration to my wife and kids for them to deal with. In the back of my mind I also wonder if the capital gains rate will eventually go up.