Is appx short for approximately?

I'm curious to know, is "appx" indeed an abbreviation for "approximately"? I've seen it used in various contexts, especially within the realms of finance and cryptocurrency, where precision and clarity in communication are paramount. Could you shed some light on this, and perhaps provide some examples of how "appx" is typically employed in such settings? I'm eager to understand the nuances behind this potential shorthand, and how it might contribute to the efficiency of professional discourse in our field.