The BBI finished the week down 0.51% on 602.62 while Riga under-performed even that mark by falling 1.41% on the week to close on 439.14.
There was good news from Valmiera Glass Group however when the company revealed in a market announcement it had enjoyed a profitable first six months of the year, reaching a consolidated net profit of €3.94m - 54% more than in the first six months of 2013.
The company's share price rose by nearly 65% in the first half of the year and the maker of fiberglass products exported to 38 countries worldwide.
Earlier in the week LSM reported on Valmiera Glass' plans to open a new US plant in early 2015.