Compute the minimum of the numeric field values of the records. This example aims to find the minimum open price of the ACWF ETF in the cf_etf_hist_price index. The minimum open price of the ACWF ETF is 24.8706:

"query": { "match": { "symbol": "ACWF"}},"aggs": {"minimum_open_price": {"min": {"field": "open"}}}