** Shares of cybersecurity firms SailPoint SAIL.O, and Zscaler ZS.O rise 2.62% and 2.29%, respectively, in premarket trading
** Fortinet's FTNT.O shares fall about 3%
** Morgan Stanley upgrades ratings on SAIL and ZS to "overweight" from "equal-weight"
** Brokerage says SAIL is making good progress in key areas like identity and data security, helped by its shift to cloud-based software and the chance to replace older systems
** MS says ZS could become a leading cybersecurity platform as it continues to grow and expand beyond traditional network protection
** Brokerage also downgrades FTNT to "underweight" from "equal-weight," citing that FTNT is expanding within its customer base, but a smaller firewall upgrade may lower future estimates
** Up to last close, stock of FTNT down ~17%, and ZS is up ~54% YTD
** As of last close, SAIL is down 10.26% since its market debut
(Reporting by Akriti Shah in Bengaluru)
((akriti.shah@thomsonreuters.com))