Central Puerto is trading 7.88% up at $12.60, with disclosed share repurchases a possible but unconfirmed catalyst. - Central Puerto bought 100,000 shares on BYMA; subsidiary Proener bought 20,000 ADRs on the NYSE in transactions dated October 1 and completed October 2. - Proener paid $237,405.02 for the ADRs. The transactions preceded the current session; the report does not establish they caused the October 5 rise. - Major U.S. indices are mixed in the supplied market context, offering no clear broad-market explanation.