The Dow Jones Industrial Average (^DJI) hit a major milestone, crossing 40,000 for the first time. Both the S&P 500 and the Nasdaq also hit new record highs (^GSPC, ^IXIC) in today's trading. One of the reasons the Dow hit a new high is Walmart (WMT). The retailer’s shares are surging after posting quarterly results that topped Wall Street estimates. Walmart got a big boost from its e-commerce business, which posted a 21% gain globally. Other trending tickers on Yahoo Finance include Alibaba Group (BABA), Advanced Micro Devices (AMD), Costco (COST), and Chubb Limited (CB).

Top guests today include:

3:05 p.m. ET - Ben McMillan, IDX Advisors Chief Investment Officer

3:45 p.m. ET - Jeremy Bryan, Senior PM at Gradient Investments, and David Miller, Catalyst Funds Co-Founder, Chief Investment Officer and Senior Portfolio Manager

4:05 p.m. ET - Cory Johnson, The Futurum Group Chief Market Strategist

4:15 p.m. ET - Mark Rayfield, Saint-Gobain North America CEO

4:35 p.m. ET - Dax Dasilva, Lightspeed CEO