** Shares of Power Grid Corporation of India PGRD.NS rise 6% to 266 rupees, set for its best day since mid-2024
** Stock top pct gainer on Nifty 50 index, which is up 0.5%
** Electric power transmission co raises its FY26 capex outlook to 320 billion rupees ($3.50 billion) from 280 billion rupees and capitalization outlook to 220 billion rupees from 200 billion rupees
** PGRD posts 8% y/y rise in Q3 consol profit, rev rises 10%
** Stock up 1% so far in 2026; it fell 14% in 2025
($1 = 91.4925 Indian rupees)
(Reporting by Nishit Navin in Bengaluru)
((nishit.navin@thomsonreuters.com))