could any one correct my grammar please?!! I don't know how to correct this. Thanks in advance!!

My eyes tend to glaze over when I'm confronted with financial terms, but I do see a couple of errors even though I don't understand what you are talking about.

You need to remove the comma after method. I believe it should be 'apply to' rather than 'apply for'.

Consider should be considered.

 The aim is to identify whether a universal desmoothing method will be suitable to apply to all considered countries to generate plausible property volatility in comparison with bond and equity.

I really, really hope I haven't changed your meaning any.