The headquarters of the African Development Bank (AfDB) are pictured in Abidjan, Ivory Coast, September 16, 2016. Picture taken September 16, 2016. REUTERS/Luc Gnago 

The headquarters of the African Development Bank (AfDB) are pictured in Abidjan, Ivory Coast, September 16, 2016. Picture taken September 16, 2016. REUTERS/Luc Gnago 

A woman passes a row of UOB, DBS and OCBC automated bank teller machines in Singapore August 17, 2016. REUTERS/Edgar Su

A worker walks past a DBS logo before an event in Mumbai, India, April 26, 2016. REUTERS/Danish Siddiqui/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH "BUSINESS WEEK AHEAD AUG 8" FOR ALL IMAGES? 

A Swiber logo is pictured at their office in Singapore July 10, 2013. Picture taken July 10, 2013. REUTERS/Edgar Su

The logo of DBS is pictured outside an office in Singapore January 5, 2016. REUTERS/Edgar Su/File Photo 

DBS Chief Executive Officer Piyush Gupta attends the 2016 Institute of International Finance (IIF) Spring Membership meeting in Madrid, Spain, May 24, 2016. REUTERS/Susana Vera 

A woman carrying an umbrella passes a DBS signage in Singapore May 11, 2016. REUTERS/Edgar Su

People queue up to withdraw money from DBS automated teller machines at a mall in Singapore May 3, 2016. REUTERS/Edgar Su 

People queue up to withdraw money from DBS automated teller machines at a mall in Singapore May 3, 2016. REUTERS/Edgar Su 

A worker walks past a DBS logo before an event in Mumbai, India, April 26, 2016. REUTERS/Danish Siddiqui 

DBS Chief Executive Officer Piyush Gupta speaks during an event in Mumbai, India, April 26, 2016. REUTERS/Danish Siddiqui 

DBS Chief Executive Officer Piyush Gupta speaks during an event in Mumbai, India, April 26, 2016. REUTERS/Danish Siddiqui 

DBS Chief Executive Officer Piyush Gupta speaks during an event in Mumbai, India, April 26, 2016. REUTERS/Danish Siddiqui 

A DBS logo on their office building in Singapore, February 22, 2016. DBS Group Holdings, Singapore's biggest lender, posted a 20 percent rise in quarterly profit that beat expectations, as its net interest margin rose to a five-year high. REUTERS/Edgar Su 

DBS Chief Executive Officer Piyush Gupta speaks during their fourth quarter earnings announcement in Singapore February 22, 2016. DBS Group Holdings, Singapore's biggest lender, posted a 20 percent rise in quarterly profit that beat expectations, as its net interest margin rose to a five-year high. REUTERS/Edgar Su 

DBS Chief Executive Officer Piyush Gupta speaks during their fourth quarter earnings announcement in Singapore February 22, 2016. DBS Group Holdings, Singapore's biggest lender, posted a 20 percent rise in quarterly profit that beat expectations, as its net interest margin rose to a five-year high. REUTERS/Edgar Su 

DBS Chief Executive Officer Piyush Gupta speaks during their fourth quarter earnings announcement in Singapore February 22, 2016. DBS Group Holdings, Singapore's biggest lender, posted a 20 percent rise in quarterly profit that beat expectations, as its net interest margin rose to a five-year high. REUTERS/Edgar Su 

DBS Chief Executive Officer Piyush Gupta listens during their fourth quarter earnings announcement in Singapore February 22, 2016. DBS Group Holdings, Singapore's biggest lender, posted a 20 percent rise in quarterly profit that beat expectations, as its net interest margin rose to a five-year high. REUTERS/Edgar Su 

A DBS sign is next to Standard Chartered (top) and Citibank signage in Singapore January 12, 2016. REUTERS/Edgar Su 

People use DBS and United Overseas Bank (UOB) automated teller machines in Singapore January 5, 2016. REUTERS/Edgar Su 

People use automated teller machines of United Overseas Bank Limited (UOB), DBS, and Oversea-Chinese Banking Corporation (OCBC) banks in Singapore January 5, 2016. REUTERS/Edgar Su 

People use DBS and United Overseas Bank (UOB) automated teller machines in Singapore January 5, 2016. REUTERS/Edgar Su 

A DBS logo is pictured next to a United Overseas Banking (UOB) branch in Singapore January 5, 2016. REUTERS/Edgar Su 

A logo of DBS is pictured outside an office in Singapore January 5, 2016. REUTERS/Edgar Su 

A logo of DBS is pictured outside an office in Singapore January 5, 2016. REUTERS/Edgar Su 

A man uses a DBS automated teller machine in Singapore January 4, 2016. REUTERS/Edgar Su 

A man uses a DBS automated teller machine next to a United Overseas Banking (UOB) teller, near an RHB Capital Bhd currency exchange booth in Singapore January 5, 2016. REUTERS/Edgar Su 

A man uses a DBS automated teller machine in Singapore January 4, 2016. REUTERS/Edgar Su 

French President Francois Hollande (C) gathers with African leaders, from 2ndL-R, President of the African Development Bank (AfDB) Akinwumi Adesina, who descends the stairs, Guinea's President Alpha Conde, Benin's President Boni Yayi, Gabon's President Ali Bongo Ondimba, President John Dramani Mahama of Ghana, and Prime Minister of Ethiopia Hailemariam Desalegn before the opening of a pre-COP21 working lunch at the Elysee Palace in Paris, France, November 10, 2015. French Foreign Affairs Minister Laurent Fabius (L Top) arrives to join the leaders. REUTERS/Philippe Wojazer 

French President Francois Hollande (C) surrounded by African leaders, from L-R, President of the African Development Bank (AfDB) Akinwumi Adesina, Guinea's President Alpha Conde, Benin's President Boni Yayi, Gabon's President Ali Bongo Ondimba, President John Dramani Mahama of Ghana, and Prime Minister of Ethiopia Hailemariam Desalegn before the opening of a pre-COP21 working lunch at the Elysee Palace in Paris, France, November 10, 2015. REUTERS/Philippe Wojazer 

French President Francois Hollande (C) surrounded by African leaders, from L-R, President of the African Development Bank (AfDB) Akinwumi Adesina, Guinea's President Alpha Conde, Benin's President Boni Yayi, Gabon's President Ali Bongo Ondimba, President John Dramani Mahama of Ghana, and Prime Minister of Ethiopia Hailemariam Desalegn before the opening of a pre-COP21 working lunch at the Elysee Palace in Paris, France, November 10, 2015. REUTERS/Philippe Wojazer 

South Korea's National Pension Service (NPS) Chairman and Chief Executive Choi Kwang (L) speaks to DBS Chief Executive Officer Piyush Gupta (R) during the opening ceremony of their offices in Singapore September 17, 2015. South Korea's NPS is looking to increase investments in China as the world's third-largest pension fund sees the recent slowdown in the Chinese economy as temporary, Choi said on Thursday. REUTERS/Edgar Su 

The new president of the African Development Bank (AfDB) Akinwumi Adesina of Nigeria sits during his investiture ceremony in Abidjan on September 1, 2015. The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

Ivory Coast's President Alassane Ouattara speaks during the investiture ceremony for the new president of the African Development Bank (AfDB) Akinwumi Adesina in Abidjan September 1, 2015. REUTERS/Luc Gnago 

Ivory Coast's President Alassane Ouattara speaks while the new president of the African Development Bank (AfDB) Akinwumi Adesina is seen on the screen during Adesina's investiture ceremony in Abidjan September 1, 2015. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina (L) of Nigeria and Ivory Coast's President Alassane Ouattara attend Adesina's investiture ceremony in Abidjan on September 1, 2015. The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

(L-R) The new president of the African Development Bank (AfDB) Akinwumi Adesina, Zambia's Minister of Finance Alexander Chikwanda, President Alassane Ouattara of Ivory Coast, Nigeria's Vice President Yemi Osinbajo, and AfDB outgoing president Donald Kaberuka attend the investiture of Adesina in Abidjan September 1, 2015. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina of Nigeria speaks during his investiture ceremony in Abidjan September 1, 2015. The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina of Nigeria speaks during his investiture ceremony in Abidjan September 1, 2015. The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina of Nigeria speaks during his investiture ceremony in Abidjan September 1, 2015. The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina of Nigeria stands during his investiture ceremony in Abidjan September 1,2015. The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina (R) of Nigeria speaks next to Zambia's Minister of Finance Alexander Chikwanda during his investiture ceremony in Abidjan September 1, 2015.The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina (R) of Nigeria speaks next to Zambia's Minister of Finance Alexander Chikwanda during his investiture ceremony in Abidjan September 1, 2015.The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

The new president of the African Development Bank (AfDB) Akinwumi Adesina of Nigeria sits during his investiture ceremony in Abidjan on September 1, 2015. The AfDB will focus in coming years on tackling Africa's chronic power shortages to try to unlock its economic potential and end its vulnerability to fluctuations in commodity prices, Adesina said. REUTERS/Luc Gnago 

People pass a DBS bank branch in Singapore August 12, 2015. Southeast Asian stocks slumped on Wednesday as China's move to extend the yuan devaluation hurt other Asian currencies and hit sentiment toward stocks. In Singapore, banking stocks were among the biggest decliners, dragging the index down 2.9 percent to its lowest closing since March 2014. DBS Group Holdings Ltd, Singapore's biggest bank, fell as much as 6.2 percent and was heading for its biggest one-day decline since March 2009. REUTERS/Edgar Su

A man walks through a door next to a DBS logo during a DBS event in Singapore July 10, 2015. DBS Group Holdings, Singapore's biggest bank, on July 27, 2015 posted a better-than-expected 15 percent rise in second-quarter net profit, helped by an eight basis point jump in interest rate margin and healthy loan growth. Picture taken July 10, 2015. REUTERS/Edgar Su 

A man passes a DBS logo outside one of their branch office in Singapore July 2, 2015. DBS Group Holdings, Singapore's biggest bank, on July 27, 2015 posted a better-than-expected 15 percent rise in second-quarter net profit, helped by an eight basis point jump in interest rate margin and healthy loan growth. Picture taken July 2, 2015. REUTERS/Edgar Su 

People pass DBS signages at a DBS event in Singapore July 10, 2015. DBS Group Holdings, Singapore's biggest bank, on July 27, 2015 posted a better-than-expected 15 percent rise in second-quarter net profit, helped by an eight basis point jump in interest rate margin and healthy loan growth. Picture taken July 10, 2015. REUTERS/Edgar Su 

A DBS logo in pictured in the backdrop of the central business district in Singapore July 10, 2015. DBS Group Holdings, Singapore's biggest bank, on July 27, 2015 posted a better-than-expected 15 percent rise in second-quarter net profit, helped by an eight basis point jump in interest rate margin and healthy loan growth. Picture taken July 10, 2015. REUTERS/Edgar Su 

Former Indonesian president Susilo Bambang Yudhoyono chats with DBS Chief Executive Officer Piyush Gupta (R) during the DBS Asian Insights Conference in Singapore July 10, 2015. REUTERS/Edgar Su 

Former Indonesian president Susilo Bambang Yudhoyono delivers a speech during the DBS Asian Insights Conference in Singapore July 10, 2015. REUTERS/Edgar Su 

Former Indonesian president Susilo Bambang Yudhoyono delivers a speech during the DBS Asian Insights Conference in Singapore July 10, 2015. REUTERS/Edgar Su 

Former Indonesian president Susilo Bambang Yudhoyono delivers a speech during the DBS Asian Insights Conference in Singapore July 10, 2015. REUTERS/Edgar Su 

Former Indonesian president Susilo Bambang Yudhoyono delivers a speech during the DBS Asian Insights Conference in Singapore July 10, 2015. REUTERS/Edgar Su 

Nigeria's Agriculture Minister Akinwumi Adesina (L), new president of the African Development Bank (AfDB), is greeted by his predecessor Donald Kaberuka during the closing ceremony of the annual meeting commemorating the 50th anniversary of the AfDB in Abidjan May 29, 2015. Adesina won an election on Thursday to become the new president of AfDB, a post that will see him guide the institution through Africa's increasingly complex financial environment. REUTERS/Luc Gnago

Nigeria's Agriculture Minister Akinwumi Adesina (L), new president of the African Development Bank (AfDB), speaks beside his predecessor Donald Kaberuka during the closing ceremony of the annual meeting commemorating the 50th anniversary of the AfDB in Abidjan May 29, 2015. Adesina won an election on Thursday to become the new president of AfDB, a post that will see him guide the institution through Africa's increasingly complex financial environment. REUTERS/Luc Gnago

Nigeria's Agriculture Minister Akinwumi Adesina (L), new president of the African Development Bank (AfDB), is greeted by his predecessor Donald Kaberuka during the closing ceremony of the annual meeting commemorating the 50th anniversary of the AfDB in Abidjan May 29, 2015. Adesina won an election on Thursday to become the new president of AfDB, a post that will see him guide the institution through Africa's increasingly complex financial environment. REUTERS/Luc Gnago

Nigeria's Agriculture Minister Akinwumi Adesina talks during the closing ceremony of the annual meeting commemorating the 50th anniversary of the African Development Bank (AfDB) in Abidjan May 29, 2015. Adesina won an election on Thursday to become the new president of AfDB, a post that will see him guide the institution through Africa's increasingly complex financial environment. REUTERS/Luc Gnago

Nigeria's Agriculture Minister Akinwumi Adesina talks during the closing ceremony of the annual meeting commemorating the 50th anniversary of the African Development Bank (AfDB) in Abidjan May 29, 2015. Adesina won an election on Thursday to become the new president of AfDB, a post that will see him guide the institution through Africa's increasingly complex financial environment. REUTERS/Luc Gnago