Weekly Report: what happened at EC last week (0817-0821)?

Last week EC had an overall gain of 1.45%, the stock price moved from 17.28 to 17.53, last week's high was 18.19, the low was 17.28, and the cumulative volume was 6.80M.

● EC reached a 52-week high last week on 21 August, quoting 17.53.