U.S. stock index futures were subdued on Monday as investors looked ahead to talks between the United States and China aimed at mending a trade rift that has rattled financial markets for much of the year. .N

** Qualcomm Inc <QCOM.O>:BUZZ - UK's Alphawave soars on Qualcomm's $2.4 billion takeover deal nL4N3SC0EQ

** Robinhood Markets Inc <HOOD.O>:

** AppLovin Corp <APP.O>:BUZZ - Falls after S&P 500 inclusion snub nL4N3SC0PZ

** Sunnova Energy International Inc <NOVA.N>:BUZZ - Falls after filing for bankruptcy protection nL4N3SC0IZ

** Joby Aviation Inc <JOBY.N>:

** Archer Aviation Inc < ACHR.N>:BUZZ - US aviation firms jump after Trump's drone defence order nL4N3SC0JI

** Children's Place Inc <PLCE.O>:BUZZ - Plunges as Q1 loss widens amid tariff woes nL6N3SC0CJ

** Intuitive Surgical Inc <ISRG.O>:BUZZ - Deutsche Bank downgrades Intuitive Surgical; stock falls nL4N3SC0MB

** FirstEnergy Corp <FE.N>:BUZZ - Slips after $1.8 bln convertible bond sale plans unveiled nL6N3SC0E7

** Merck & Co Inc <MRK.N>:BUZZ - Rises after cholesterol drug trial data nL4N3SC0QY

(Compiled by Rajarshi Roy and Sumit Saha in Bengaluru)

((Rajarshi.Roy@thomsonreuters.com))