** Shares of satellite communications firm Viasat VSAT.O rise 4.3% to $38.56 premarket after J.P. Morgan updates stock to "overweight" from "neutral"
** Brokerage cites higher likelihood of a separation of the Defense and Advanced Technologies (DAT) segment for the upgrade
** Says the DAT segment trades at a steep discount to peers despite strong top-line growth
** Brokerage adds that co's communication services segment is also under-appreciated and supported by a solid backlog
** Five of 9 brokerages rate the stock "buy" or higher, three "hold" and one "sell"; their median PT is $40.50
** VSAT shares hit two-year high on Monday
** VSAT has more than quadrupled YTD vs 4.4% gain for Nasdaq Telecommunication Index .IXUT
(Reporting by Utkarsh Tushar Hathi)
((utkarshtushar.hathi@thomsonreuters.com))