{
  "type":"record",
  "name":"stock_ticks",
  "fields":[{
     "name": "volume",
     "type": "long"
  }, {
     "name": "ts", 
     "type": "string"
  }, {
     "name": "symbol", 
     "type": "string"
  },{
     "name": "year", 
     "type": "int"
  },{
     "name": "month", 
     "type": "string"
  },{
     "name": "high", 
     "type": "double"
  },{
     "name": "low", 
     "type": "double"
  },{
     "name": "key", 
     "type": "string"
  },{
     "name": "date", 
     "type":"string"
  }, {
     "name": "close", 
     "type": "double"
  }, {
     "name": "open", 
     "type": "double"
  }, {
     "name": "day", 
     "type":"string"
  }
]}