** Shares of NTPC NTPC.NS rise 2.3% to 342.65 rupees
** CLSA says India's largest power producer is boosting capacity by 15% and fast-tracking its clean energy shift, setting a higher benchmark for growth after its annual analyst meet
** India's energy security and net-zero plans represent a decadal growth opportunity for NTPC -- CLSA
** Brokerage maintains "outperform" rating with a price target of 459 rupees, an implied upside of 37% from current levels; Says there is scope for NTPC stock to outrun PT within 12 month period
** Average rating of 24 analysts tracking NTPC is "buy"; median target price is 433 rupees, data compiled by LSEG shows
** NTPC shares up 0.5% YTD, lagging the Nifty 50's .NSEI 6% rise, exchange data shows
(Reporting by Bharath Rajeswaran in Bengaluru)
((bharath.rajeswaran@thomsonreuters.com; +91 9769003463;))