2 sentences

1. 股市今天早上九点半准时开盘。

   gǔ​shì jīn​tiān zǎo​shang jiǔ​diǎn​bàn zhǔn​shí kāi​pán.

   The stock market opened on time at 9:30 this morning.

   Source: Dong Chinese Dictionary

2. 由于公司业绩优于预期，其股价在今日开盘后迅速攀升。

   yóu​yú gōng​sī yè​jì yōu​yú yù​qī, qí gǔ​jià zài jīn​rì kāi​pán hòu xùn​sù pān​shēng.

   Because the company's performance exceeded expectations, its stock price climbed rapidly after the market opened today.

   Source: Dong Chinese Dictionary