China’s rapid move to stem a rout in its stock markets – through direct state buying and pledges of more stabilising measures – underscores the resolve of policymakers to protect the country’s high-stakes push for technology innovation and safeguard more than 200 million individual investors. Beijing’s intervention signals a regulatory intention to engineer a more durable and sustainable bull run on the nation’s US$15 trillion stock market, which is now counted on to support strategic tech...