Liberty Broadband rises on counter-offer to merge with Charter Communications

** Shares of cable TV pioneer John Malone's Liberty Broadband LBRDA rise 27.5% to $76.50 - their highest level in more than seven months

** LBRDA proposes all-stock merger with cable and broadband company Charter Communications CHTR

** Liberty holds a 26% interest in CHTR, while it has 16.5% ownership in information and analytics firm Comscore, according to its website

** LBRDA also operates Alaska-based telecom company GCI, which provides data, wireless and other services to residential customers and businesses, among others

** Proposed transaction includes closing date of June 30, 2027 or earlier, if the parties mutually agree, LBRDA says

** "The deal may not have a material impact on Charter stock beyond the refinancing or repayment choices made with respect to Liberty’s debt," brokerage Barclays says

** Up to last close, LBRDA stock down ~26% YTD