Meme mania is sweeping through the US stock market again, but this time it's trillion-dollar companies that can distort and sink entire equity markets, says Shuli Ren for Bloomberg Opinion.

SpaceX’s value has soared $1.3 trillion in three sessions on Wall Street. This is a story of momentum and market mechanics, not maths.

Retail investors are driving up demand for SpaceX stock, but one analyst warns it could turn into a meme stock.