请问在股票数据中，用GARCH的时候，碰到股票停牌或者除权除息都该怎么处理？








另外，我在用garchfit函数的时候出现??? Attempt to execute SCRIPT roots as a function:
D:\zmf\matlab\toolbox\matlab\polyfun\roots.m

Error in ==> garchfit>armanlc at 2992
AReigenValues =  roots([1 ; -Parameters((isConstantInMean + 1):(isConstantInMean +
R))]);

Error in ==> fmincon at 597
        [ctmp,ceqtmp] = confcn{3}(X,varargin{:});

Error in ==> garchfit at 908
[coefficients, LLF   , ...

Error in ==> BStest at 6
[coeff,errors,LLF,innovations,sigmas,summary]=garchfit(R);

Caused by:
    Failure in initial user-supplied nonlinear constraint function evaluation.
    FMINCON cannot continue.
这是怎么回事？