A key interest rate of 10-12% serves as a "psychological threshold" for business to start the investment cycle, German Gref said ST. PETERSBURG, June 5. /TASS/. Traditional, or inertial, drivers of Russia’s economic growth are nearing exhaustion, making a new economic growth model necessary, Sberbank CEO German Gref said at Sber’s business breakfast held as part of the St. Petersburg International Economic Forum (SPIEF-2026). He noted that representatives of small businesses are the foundation