First, I am a French student, so forgive me for my English which can be not clear at all.

I have to analyze a financial series. I have some difficulties to make the second part of the work which focuses on ARMA model. I can't read (interpret?) my Autocorrelation Function (ACF) and Partial Autocorrelation Function (PACF) correlogramm.

To my mind, here we have a MA(0) but I don't know if it's possible. In this case, what does it mean ?

And I don't know also with the PACF graph, if we are in a AR(3) or AR(6). And why the first stick is not over the "confidence level" ?

It is possible that my interpretations are false, please tell me.