China did that in 2015 when stock were tanking. "...forced state-owned brokers to promise to buy stocks until the index reached a higher level, mobilized state

China did that in 2015 when stock were tanking. "...forced state-owned brokers to promise to buy stocks until the index reached a higher level, mobilized state-controlled funds to purchase equities, and promised unlimited support from the central bank. " https://www.brookings.edu/opinions/making-sense-of-chinas-stock-market-mess/ https://www.brookings.edu/opinions/making-sense-of-chinas-st...