And while it might sound like government intervention incompatible with a market economy, short selling of banks has been prohibited in Spain, Italy and the US

And while it might sound like government intervention incompatible with a market economy, short selling of banks has been prohibited in Spain, Italy and the US at various times in the last 20 years. Only in downturns as an "emergency response", but that's when people want to short sell them and when they are most likely to be overpriced.