Tesla's (NASDAQ:TSLA) a short says Barron's Bill Alpert in a cover story which rehashes familiar arguments, but notes the shares - recently essentially unborrowable - can now be had for a single-digit interest rate. Perhaps the most interesting part of the story is Elon Musk hanging up on Bill Alpert during an interview for the piece: "I have no interest in an article that debates what we consider to be an obvious point - which is that there is a dramatic reduction in battery costs ... I am terminating this interview."