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The bull market turns eight years old as investors ask if it'll survive nine

Wall Street is eyeing a second day of losses. Stocks started the day in the minus column as investors assess President Trump’s policies, including a plan to repeal and replace Obamacare.

Here are some of the other stories the Yahoo Finance team is covering for you today.

The GOP Obamacare prescription
House Republicans have unveiled a bill to overhaul Obamacare, replacing subsidies with tax credits and getting rid of penalties for people who don’t buy insurance and for large companies that don’t offer coverage to their employees. The bill also maintains Medicaid expansion temporarily. Will it fly?

Trump takes credit for Exxon plan
Donald Trump is taking credit for news that ExxonMobil (XOM) plans to invest $20 billion to expand its chemical and oil refining plants on the U.S. Gulf Coast. CEO Darren Woods says the projects will create 45,000 jobs over 10 years. Is Trump’s response accurate or appropriate?

Snap takes a tumble
Snap (SNAP) shares slid more in today’s pre-market after falling 12% Monday. Several analysts have issued sell ratings after the stock soared in the first two days of trading after Snap’s IPO last Wednesday. Despite the selloff, the money-losing company still has a market value approaching $28 billion. Is it still overvalued?