Concerned about an AI bubble? Sign up for The Daily Upside for smart and actionable market news, built for investors. Last July, South Korea’s LG Energy Solution said it inked a $4.3 billion contract to supply batteries to … someone. The secret was as poorly kept as a college frat house, with reports immediately pointing to Tesla as the not-so-mysterious counterparty. Nearly eight months later, LG confirmed its deepened partnership with the Elon Musk-led automaker on Tuesday, after the Department of the I ...