TaxRate ( Symbol symbol , int fiscalPeriod );    
Default values:
symbol: current symbol
            fiscalPeriod: FiscalPeriod.YEAR
    
    
Description
The TaxRate function returns the ratio of income tax imposed on a company to the income before tax of that same company, expressed in percent. By default, the value is returned for the current symbol and based on the annual reporting data. To specify a different symbol for this function, modify the value of the symbol input parameter. To use quarterly data instead of annual, assign the FiscalPeriod.QUARTER constant to the fiscalPeriod input parameter.