how to get Residuals Standard Deviation in output proc model

[sasphd]

Hello 

how to get Residuals Standard Deviation in output proc model thanks

proc model data=WIL2.data_fundid8;
parms alpha b c d e f g;
aggreate_mret1 =rf+alpha+b*(Mkt_RF)+c*SMB+d*HML+e*MOM+f*RMW+g*CMA;
fit aggreate_mret1 /gmm ;
by FundId;
ods output ParameterEstimates=WIL2.performance_MF;
run;

[Ksharp]

Better post it at Forecasting Forum, since PROC MODEL is under SAS/ETS .
https://communities.sas.com/t5/SAS-Forecasting-and-Econometrics/bd-p/forecasting_econometrics