Hey! I am a total beginner in SAS but I have to use it for my bachelor thesis. So my problem is: I have this data set of which you can see a very small extract below (form view). I now want to loop through this table and for every Underlying_Symbol, every date, every Expiration and every strk_prc I want to create a new observation in a new table that contains this information and another variable calculated from the sum over the tradeprices of trades with that specific Underlying, date, .... It would even help me if someone can show me how I loop over these four variables of my data, especially the date.   Thanks in advance!!!     ... View more