{  
    "aggs": {
        "stock_types": {
            "terms": {
                "field": "stock",
                "order": {
                   "stock_price": "desc"
                }                
            },
            "aggs": {
              "stock_price": {
                  "avg": {
                      "field": "value"
                  }
              },
 			  "value_stats" : { "extended_stats" : { "field" : "value" }    }
            }
        }
    }
}'