Abbott LaboratoriesABT.N advanced 2.8% after beating third-quarter profit estimates on strong sales of devices, diagnostics products. By Ankika Biswas and Shashwat Chauhan Oct 18 (Reuters) - Wall Street's main indexes fell on Wednesday as growing tensions in the Middle East dented risk sentiment, with investors also focused on earnings to gauge the impact of inflation and high interest rates on businesses. "Gold has been holding with safe haven demand and even though Treasuries aren't doing the greatest, the dollar has been faring fairly well with the increased tensions over there," said Brian Jacobsen, chief economist at Annex Wealth Management.