** Shares of life insurer Globe Life GL.N rise ~1% to
$110.29 premarket
** GL approves share buyback worth up to $1.8 bln under its
existing stock repurchase program
** Authorization has no set time period and replaces
previous authorization of $1.3 bln announced in April - GL
** Piper Sandler says the buyback authorization is
incrementally positive as there was a significant amount of
"opportunistic" share repurchase activity since the April
announcement
** As of last close, GL shares down 10.3% YTD
(Reporting by Arasu Kannagi Basil in Bengaluru)
((ArasuKannagi.Basil@thomsonreuters.com;))