According to real estate analytics company Zumper, the exodus, out of San Francisco has been so great, that the median rent for a one-bedroom apartment collapsed more than 20% in September from a year ago to $2,830. Month over month, September rent for a one-bedroom apartment in the city fell by 7%. 

Referring to the plunge in rent prices in San Francisco, Zumper said:

"Not only is this drop among the largest yearly decreases Zumper has ever recorded in our history of tracking rental prices, but it was also the first time the median 1-bed price in San Francisco was priced below $3000. These combined trends show just how drastically the market has changed in the nation's most expensive city to rent." 

Zumper CEO Anthemos Georgiades, who was quoted by CNBC, said a flood of supply is hitting the market: 

"Some renters may be inclined to move to the suburbs to get more space, as the Covid-19 pandemic spurred companies to close offices and allow employees to work from home. Facebook and Google, for example, have told employees they can work remotely at least through next summer," Georgiades said.