is only needed if the Field or table occurrence names contain special symbols that would otherwise interfere with how FileMaker evaluates the calculation expression.
if Symbol is the name of your field and Table is the name of your relevant table occurrence, then this expression should work:
"http://investing.money.msn.com/investments/stock-cash-flow/?symbol=us%3A" & Table::Symbol & "&stmtView=Qtr"
Thank you kindly Phil, that works perfectly. It is greatly apprciated.