10 things you need to know before the opening bell

Here is what you need to know.  1. It's the start of the Jackson Hole conference in Wyoming today. Here's what to look out for.  2. After two years touting a booming economy as his own doing, President Donald Trump is test driving a new message on the economy: Any chance of a recession is not his fault. However, Democrats are calling the president's bluff, including Joe Biden.  3. China hopes the United States will stop its wrong tariff action, the commerce ministry said on...