Online brokerage Groww continued to strengthen its position in India’s stockbroking market in September, adding 1,00,961 active clients even as the industry’s overall client base grew just 0.35% month-on-month, according to data from the National Stock Exchange (NSE).The addition took Groww’s active client base to 1.34 crore and its market share to 29.16%, up from 29.04% in August. Groww alone accounted for more than 60% of the industry’s net