** KeyBanc raises PT for Extra Space Storage EXR.N to $178
from $172; maintains "overweight" rating
** Brokerage sees potential for EXR to generate "premium
growth" in comparison to its peers, helped by Life Storage
merger
** KeyBanc says EXR's revenue management platform,
third-party management business and external growth strategies
to provide additional support
** New price target represents 2.54% upside to stock's
previous close
** Six of 18 brokerages rate EXR stock "buy" or higher, nine
"hold" and three "sell" or lower; their median PT is $175
** As of Friday's close, EXR up 8.26% YTD
(Reporting by Anshuman Tripathy in Bengaluru)
((Anshuman.Tripathy@thomsonreuters.com;))