References to BHP Billiton’s proposed new South32 business as DudCo have disappeared from analyst coverage, a Fortune writer has noted. He puts the change down to the falling prices of iron-ore and oil, which remain with BHP Billiton, and the steadier prices of aluminium, manganese, nickel and silver, which form the backbone of South32. If the deal is approved, BHP Billiton shareholders keep their shares in the parent, which gives them exposure to 100-year mine lives, and at the same time stand to enjoy a ride on South32 — unless the giant receives an offer from third parties which is just too good to refuse should unforseen changes make it prudent to escape unexpected new commodity and geographic risk.