Africa's biggest oil producer will also introduce inflation-linked bonds in 2012 in a bid to develop the domestic bond market, Abraham Nwankwo, director-general of the agency, told Reuters in a phone interview.

"Nigeria is most likely to have a diaspora bond in the market in 2012," he said. "We are working seriously on it."

He said the DMO had received the backing of finance minister Ngozi Okonjo-Iweala, a keen advocate of tapping the wealth of migrants to finance infrastructure projects in their home countries.

"The finance minister has talked about diaspora bonds," Nwankwo said. "She has given us instructions to progress on that."

Nwankwo said the size of the diaspora bond was yet to be determined but stressed that its proceeds would be used for "specific, commercially viable projects". Its tenor was likely to be five years or longer.

"We are working hard to make sure we structure it in a manner that is consistent with the preferences of the Nigerian diaspora and at the same time satisfies our need to mobilise the resources to fund the provision of critical national infrastructure and development projects," he said.

The DMO is planning roadshows in the first quarter of 2012 in Europe, North America and possibly the Middle East and South East Asia. The response from roadshows in London and Texas in the last two years was encouraging, he added.

The bond would be open not only to Nigerians in the diaspora but also "friends of Nigeria, whether individual friends or communities or investment funds".

On the plan to issue inflation-linked bonds, Nwankwo said it was part of an attempt to develop the bond market. the timetable would be finalised in the first quarter of 2012.

"We're trying to reach higher levels of maturity in the market," he said. "We've had four to five years of plain vanilla. This is the time to think of a little more sophisticated variants of the bond."

Annual inflation in Nigeria, sub-Saharan Africa's biggest economy after South Africa, stood at 10.3 percent in September and has been in double digits for most of the last two years.