I disagree, but would go even further to say the stagflation is causing the bull market. We are currently in the middle of a recession masked by trillions of dollars printed and handed out. GDP growth is lower than the amount of new dollars added to the float, meaning the GDP is actually shrinking.
Simultaneously, the inflation caused by such policies persuades investors to throw their money into assets like the stock market as a hedge against inflation, causing a bull market.