In terms of volume and price, RB1910 rose 50 yuan / ton to close at 4042 yuan / ton; HC1910 closed up 39 yuan / ton to close at 3910 yuan / ton; I1909 closed up 19.5 yuan / ton from the previous trading day to close at 880.5 yuan / ton; J1909 closed down 3.5 yuan / ton from the previous trading day to close at 2119 yuan / ton. In terms of position data, RB1910 handled 3.66 million transactions, an increase of 23500 to 2.42 million; I1909, 2.95 million, with a decrease of 56000 to 1.43 million; in terms of capital flows, the net inflow of RB1910 funds today was 172 million yuan; and the net outflow of I1909 funds was 163 million yuan. Viewpoint: shock operation. Today, iron ore continued yesterday's strong pattern, long month contract trading once rose, yesterday, S & P said that due to the impact of Vale dam break, at least until the end of 2021 iron ore prices will maintain a rise, boost market sentiment, at the same time, Rio Tinto cancelled the supply of some Changxie mines in July, resulting in the market resources to maintain a tight pattern; On the whole, the current situation of high base difference and low inventory of iron ore has not changed, and the price is expected to remain high; mature materials are affected by environmental protection and production restrictions, and there is little problem on the supply side. After the emergence of plum in East China, the demand is expected to be released quickly, the overall balance of supply and demand is more balanced, and the short-term is still a wide concussion pattern. After building the rising relay platform, the probability of continuing to go up is greater. Coke as a result of futures spot more, providing a risk-free arbitrage opportunity, so the futures price correction is not surprising, but after three rounds of reduction, the spot probability will start to raise the price, the price falling space is limited, the late probability of starting the current resonance rise, patiently waiting to do long opportunities. Strategy: RB1910 contract range (3930, 4200); I1909 contract range (820920), middle line multiple single hold, short-term high throw low suction. Disclaimer: this information comes from a statistical arbitrage model based on historical data, and all conclusions are based on reliable and publicly available information. The SMM quantification team is not responsible for any losses that may be caused by all information. We recommend that investors independently evaluate specific investments and strategies. Investors are also encouraged to seek advice from professional financial advisers. This information does not provide a tailored investment strategy.