Tsingshan sold 200,000 ton March 2023 contracts at price of $20 per kilo. The Initial Margin was $20,000 per contract.(see Article 2). On March 8,2022 price of Nickel went suddenly up $100 per kilogram. Q. 3.1 What is the margin call to Tsingshan? Will there be any damage to Tsingshan' s booking broker if Tsingshan cannot pay the margin call Q. 3.2( A made-up story- see more in Article 5) Data: XYZ shorts 200,000 Ton of Nickel on March 1 at $20,000 per ton Below are Nickel prices for 2/22; and 3/1/22-3/ 9/22 Calculate the margin calls on every day between March 2 through March 7 and sum them up. By end of March 8 trading a new margin call arrives (How much?) and XYZ cannot meet it- its position is liquidated at $100,000 per ton and company is destroyed, although it would be viable if it could survive till March 9. How can it be? Q. 3.3 Use data from Q. 3.2 to explain the Situation Tsingshan was involved in Q.4 What has happened in WTI future markets on April 2020- see Article 3 Q.5 Find the technical details about the delivery quality standards for the Chinese hog markets futures. see