** Shares of Optiemus Infracom OPTI.NS up 3.6% to 694.2 rupees
** Mobile and telecom products firm signs joint venture with London-based smartphone maker Nothing
** Nothing and Optiemus to invest more than $100 mln in India over the next three years to expand Nothing's smartphone manufacturing in the country
** Stock set to rise for a fourth straight week
** Stock has been above its 50-day, 100-day, 200-day simple moving avgs since early Sept, indicating bullish sentiment
** More than 1.2 mln shares traded, 3.4x their 30-day moving avg
** YTD, OPTI down ~4%
(Reporting by Anuran Sadhu in Bengaluru)
((Anuran.Sadhu@thomsonreuters.com; +91 8697274436;))