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

Last week ERC had an overall gain of 0.54%, the stock price moved from 9.25 to 9.30, last week's high was 9.35, the low was 9.16, and the cumulative volume was 169.40K.

● ERC reached a 52-week high last week on 21 August, quoting 9.30.