Some investors are valuing Elon Musk's Neuralink at $42 billion

Investors are valuing Elon Musk's Neuralink at up to $42 billion in secondary markets, a significant increase from its $9 billion valuation in a funding round over a year ago. The surge reflects growing demand for Musk's ventures, partly driven by SpaceX's recent $1.6 trillion IPO. Neuralink, a private company developing brain implants for paralysis patients, has attracted bids as high as $60 billion in recent transactions.