You could do something very similar by having one person short a liquid security with low borrowing costs (like SPY maybe) and have the other person buy it.
The buyer will tend to make more money than the shorter, so you could find a pair of securities with similar expected return (e.g., SPY and EFA) and have each person buy one and short the other.
You could also buy one security and short another without there being a second person. But I don’t think this is an efficient use of capital—it’s better to just buy something with good expected return.
You could do something very similar by having one person short a liquid security with low borrowing costs (like SPY maybe) and have the other person buy it.
The buyer will tend to make more money than the shorter, so you could find a pair of securities with similar expected return (e.g., SPY and EFA) and have each person buy one and short the other.
You could also buy one security and short another without there being a second person. But I don’t think this is an efficient use of capital—it’s better to just buy something with good expected return.