SET FOR THE WORST: Hmm. Maybe it’s not just to save on taxes or manage “tail risk,” after all. I emailed a knowledgeable longtime Warren-Buffett-watcher over the weekend to ask what he made of Berkshire Hathaway’s moves lately to sell off big chunks of Apple and Bank of America and add to its already-towering pile of cash. He said he thought the sales “could be a signal that they are preparing for something bad,” and then reminded me that “Buffett has always been worried about nuclear war.” Oh. Let’s just say that wasn’t the answer I was hoping to hear.