New Delhi, Dec. 5 -- Russia's largest bank Sberbank will invest in India's capital markets and also help Russian retail investors access the benchmark Nifty50 index on the National Stock Exchange, Herman Gref, the lender's chief executive officer and chairman, said on Thursday. In an interaction with reporters, he said that the bank's investment plans in India involve investments in government securities. The Sberbank chief's remarks came as a Russian delegation led by president Vladimir Putin is in New Delhi on a 27-hour visit starting Thursday. Gref has served as Russia's trade and economy minister during 2000-2007, and has headed the state-run bank thereafter. The lender recently launched an instrument for private Russian investors to invest in Nifty50 companies. "We launched (an instrument) three days ago. We launched a special instrument for the private investors in Russia (to get) the opportunity to invest in Nifty50 index. And what we see, it would be a good opportunity for the Russian companies, for the Russian private people to invest in India," he said....