code: def normalize(self,asOf=None,multiplier=100):
  	
  	if not asOf:
  		x0=self.ix[0]
  	else:
  		x0=self.ix[asOf]
  	return self/x0*multiplier
docs: Returns a normalized series or DataFrame
  	
  	Example:
  		Series.normalize()
  
  	Returns: series of DataFrame
  	
  	Parameters:
  	-----------
  		asOf : string
  			Date format
  			'2015-02-29'
  		multiplier : int
  			Factor by which the results will be adjusted