Does this volatility-like measure have a name?

So, basically I'm looking at {=SQRT(AVERAGE((R1:R100)^2))}, or in words: the square root of the average of squared daily returns.

Is there a nice simple term/name for this? (By simple term, I mean a word that I could use with non-statisticians and the like.)

• I suppose it is the RMS (root mean square) return, but that term is not in widespread non-technical use en.wikipedia.org/wiki/Root_mean_square Mar 30 '20 at 16:41
• In statistical term this is a square root of second general moment, i.e. $\sqrt{E(X^2)}$. Could you provide more details? For which calculation do you use this measure? Afer that I would come with laymen explanation your are looking for. Mar 30 '20 at 18:22
• Just one comment, the measure seems not to express volatility as there is no base you are measuring difference against (like an average in standard deviation). Mar 30 '20 at 18:25
• @noob2 I just might use 'quadratic mean' mentioned in the Wikipedia article. Thanks Mar 30 '20 at 18:26
• @MartinVesely I'm not looking for a layman explanation. (I have that.) But, rather, I'm looking for a good term/name for the measure to use after having explained it. Mar 30 '20 at 18:29