(Yicai Global) Jan. 9 -- The Shenzhen Stock Exchange's primary and growth benchmarks hit new 20-month highs this morning as mainland markets fared well following United States President Donald Trump's brushing off of an Iranian attack on American military bases in Iraq.

The Shenzhen component index closed 1.07 percent higher at 10,820.96 going into the lunch break, while the ChiNext Price Index, which tracks growth enterprises listed in Shenzhen, shot up 1.75 percent to finish at 1,895.27. The Shanghai Composite Index was up 0.47 percent at 3,081.36.

Trump said at the White House yesterday that Tehran "appears to be standing down," after reporting that the Iranian attack, retaliation for the US killing one of its major generals, did not harm American troops and caused minimal damage.