What is the fine-grained topic of the following text: Also involved in most cases is Alejandro Vandenbroele, who has been described by ex-wife Laura Muñoz as Boudou’s ‘frontman.’ Other cases include using insider information to buy sovereign debt ahead of Argentina’s 2010 debt exchange, handouts related to Formosa Province’s 2009 debt restructuring, and the acquisition of 19 luxury cars by the Economy Ministry under his tenure. Only return the topic.
Allegations of corruption and economic manipulations involving Alejandro Vandenbroele and Boudou.