By Bret Kenwell A recent filing shows that Warren Buffett continues to hold an outsized position in Occidental Petroleum stock. Is it time for investors to as well? Energy stocks are on the move on Monday morning. That’s as the S&P; 500 pushes higher, as oil prices jump and as Warren Buffett remains a bull in Occidental Petroleum (OXY) – Get Occidental Petroleum Corporation Report. A Schedule 13-G updated investors on Friday after the close that Buffett’s Berkshire Hathaway (BRK.A) – Get Berkshire Hathaway Inc. Report (BRK.B) – Get Berkshire Hathaway Inc. Report had confirmed its recent stake …