Elon Musk loses $15 billion in net worth after Tesla stock sinks

Elon Musk's new political party is prompting a Tesla stock sell-off. Dado Ruvic/REUTERS Tesla shares fell nearly 7% after Musk launched the America Party, escalating a feud with Donald Trump. Musk lost $15 billion in net worth following the sell-off, per the Bloomberg Billionaires Index. Investors…