The share price has grown exponentially since 1969, but Walmart paid a high price for one mistake.

The addressable opportunity of the global retail industry is projected to reach nearly $37 trillion by 2030 -- and Walmart is helping lead the charge. Walmart is set to become the largest-ever ...

Here is a look at why companies split their stocks and why it matters. Upcoming splits worth keeping an eye on include one by Southern Copper.