English to French Bus/Financial Finance (general)

Bonjour,

Comment traduiriez-vous ce verbe dans ce contexte (conditions de concurrence équitable, marché financier) ?

"Over the years, incumbents have optimized their use of explicit and implicit public subsidies and barriers to entry, and it is costly to undo these distortions one by one. In addition, leverage can be rewarded by institutional investors who would like to lever up, but are precluded by charter or regulation."

Merci d'avance :)