seems a possibility in this context.

HTH

new business alone is not sufficient. So:
Vínculo do asset management ao Banco XX potencializa as chances de captacao
LINKING ASSET MANAGEMENT TO BANK XX IMPROVES/STRENGTHENS OPPORTUNITIES FOR OBTAINING NEW BUSINESS /NEW BUSINESS CAPTURE
A estrutura de captacao com maior capilaridaded é a través do sistema bancário..
THE NEW BUSINESS CAPTURE STRUCTURE WITH THE GREATEST...IS VIA

These are just rough tarnslations to check out context fully...

See refs like this->
ENVIRONMENTAL NEW BUSINESS CAPTURE IN DOD BASE CLOSURES, PRIVATIZATION, AND DOE

http://www.google.com/search?q=new business capture&hl=es&bt...

See how these words fit into your context. I believe that acquisition and obtaining should go fine. Since they have practically the same meaning, you may use only one of them, if you wish.

To convert into capital. The supply with capital or investment funds.

Asset Management linkage to Banco XX will increase the chances for capitalization.

"A structure of capitalization with a greater attraction is achieved through the banking system.."

capilaridade as an attraction

That's how I would say it.

funding = captação (de fundos);

funds obtained in the open market = captações no mercado aberto

funding cost=custo da captação

funding=obtenção/captação de recursos
(Dicionário de Termos Financeiros e de Investimento-John Downes/Jordan Eliot Goodman/Ana Rocha

fundraising = captação de fundos para fins de caridade ou políticos