person1,0,1488566548,AAPL,500,34.42
person1,1,1488566549,A,210,50.55
person1,2,1488566550,B,211,202.32
person2,3,1488566555,S,2,42.44
person3,4,1488566155,ABC,2,52.44
person4,5,1488566255,Z,2,62.34
person4,6,1488566655,S,2,10.01
