(ShareCast News) - Polyus Gold's very healthy cost position has finally begun to impress the market, the Financial Times' Lex said.The Russian gold miner's shares rallied 5% in the past month, Lex said, ahead of the rest of the sector.Polyus Gold benefitted from a collapse in emerging market currencies, and had cut expenditure in areas such as spare parts and fuel, Lex said."If management can prise out more production growth - up 5% this past year - Polyus's future should stay bright," the above column said.Investors in Rank Group should take profits, the Times' Tempus column advised.The gaming operator was lucky to see bingo duty halved to 10%, Tempus said, which led to an improvement from Rank's Mecca bingo clubs and allowed increased investment.While many gambling operators had talked about a "joined up" experience between physical venues and online, Rank is actually doing it, Tempus said.Even in a sector with lots of merger activity, Rank looks fully valued, Tempus said, advising investors to take profits."The shares look fully valued after a strong run even though it still has growth prospects in the longer term," Tempus said.