French to English Bus/Financial Investment / Securities Equity report

I'm translating an equity report for an asset-management company from French (France) to English (United Kingdom) and am having trouble with a phrase. Please find it below in a full sentence to give you full context:

'Par la suite, le sentiment global des investisseurs s'est inversé, et le Fonds a ajusté son exposition indicielle acheteuse dans le sillage du rebond des marchés actions.'

I was thinking along the lines of 'long indexed exposure'. Would that be the most appropriate choice?

Many thanks!