There are many ways to speculate in gold in China, mainly spot gold, account gold and gold futures. According to the preferences of different investors, their choices are also different. Among them, Shanghai gold futures is the gold futures contract listed and traded in the previous period. So, how much do investors need to buy Shanghai gold futures? The calculation formula of funds needed to buy Shanghai gold futures is = Shanghai gold price × trading unit × margin ratio, and its trading unit is per lot 1000g. Therefore, the funds required for investors to buy Shanghai gold in one hand are not static, and will change with the changes of market price and margin ratio. When the market price is high and the margin ratio is large, investors need more funds to buy Shanghai gold, but when the market price of Shanghai gold is low. For example, the price of Shanghai Gold on the 23rd is 342 yuan, and the margin ratio of investors is 10%. The capital needed to buy Shanghai gold here is 342× 1 1,000×10% = 34,200 yuan, and the trend of Shanghai gold is relatively strong. On the 24th, the market price rose to 358 yuan, so investors were here. It was also a one-handed purchase, because the market price on 24th was higher than that on 23rd 16, which caused investors to spend more 1600 yuan. At the same time, it should be noted that Shanghai gold futures are risky and there is a situation of forced liquidation. After investors buy Shanghai gold, they can set a stop loss to reduce the losses caused by the rapid fluctuation of market prices. Investment is risky, so be cautious when entering the market.