Open this photo in gallery: The IMF headquarters, in Washington, on Sept. 4, 2018.Yuri Gripas/Reuters The International Monetary Fund on Tuesday raised its 2023 global growth estimates slightly given resilient economic activity in the first quarter, but warned that persistent challenges were dampening the medium-term outlook. The IMF in its latest World Economic Outlook said inflation was coming down and acute stress in the banking sector had receded, but the balance of risks facing the global economy remained tilted to the downside and credit was tight. The global lender said it now projected global real GDP growth of 3.0 per...