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Two former owners of AFP Cuprum are being investigated on charges that they made irregular campaign contributions to dozens of right-wing politicians.

Its other key bet was on Chile's Cuprum Resources, which holds a copper project expected to start producing in 2014.

It had been internalized since the takeover bid for Cuprum was announced ... that Provida would be valued at similar multiples.

Principal Financial Group agreed in October to buy Chilean pension company AFP Cuprum for about $1.51 billion to expand in emerging markets.

Principal Financial agreed in October to use a public tender to buy Cuprum, including a 63 percent stake held by financial groups Empresas Penta and Inversiones Banpenta.