** Shares of air-taxi maker Joby Aviation rise 2.88% to $8.21 in premarket trading
** JOBY says it completed major aerostructure tests for certification credit with the Federal Aviation Administration
** Five of 9 brokerages rate the stock "buy", three "hold" and one "sell"; their median PT is $9, according to data compiled by LSEG
** Up to last close, stock up 20% YTD
(Reporting by Anshuman Tripathy)
((Anshuman.Tripathy@thomsonreuters.com))