Tesla may be the new kid on the block in the auto industry, but it's quickly become a big kid on Wall Street. The electric-car maker's shares continued to climb more than 4% on Tuesday. This increases the company's total market value above $500 billion for the first time. The milestone comes on the heels of a banner year for Tesla's stock, says CNN. Tesla recently upgraded facility now has the capacity to build 500,000 Model Y and Model 3 sedans a year.