I'm guessing the tweet is from a leftists given the use of 'beta',

It's the Greek character itself. Beta is a measure of volatility. Specifically the ratio of an individual stock's covariance to the market vs. the market's overall variance. Neutral beta is risk in line with the market. Low beta is less volatile than the market. "High beta" is something riskier than average.

I'm guessing the tweet is from a leftists given the use of 'beta',

Beta is a measure of volatility. Specifically the ratio of an individual stock's covariance to the market vs. the market's overall variance. Neutral beta is risk in line with the market. Low beta is less volatile than the market. "High beta" is something riskier than average.