« Why does Munger still believe in it? »
Just my opinion, I believe he's stubborn and simply refuses to admit he made a mistake.
To answer your question from the other board, which, by the way, is almost exclusively devoted to politics and nonsense.
BYD was not listed in the 2011 AR, but it was listed on page 17 of the 2010 AR.
As of 12/31/2010
225,000,000 shares
232,000,000 USD Cost Basis
1,182,000,000 USD Market Value