Ontario Stockyards Inc (OSI) Weekly Graphs OSI Weekly Graphs (Price & Volume): 2021 vs 2020 vs 5-year average (2016-2020) Note: Between September 15, 2020 and November 15, 2020 there was no data available for Ontario Stockyards OSI Lambs under 50lbs OSI Lambs 50-64lbs OSI Lambs 65-79lbs OSI Lambs 80-94lbs OSI Lambs 95-110lbs OSI Lambs over 110lbs OSI Sheep (all weights)