Oil stocks were leading the risers on the FTSE 250 on Friday with Afren, Premier Oil and Enquest making decent gains as oil prices bounced slightly after recent losses. Brent crude was higher after hitting a 13-month low on Thursday.In contrast, precious metal producers such as Centamin, Hochschild Mining and African Barrick Gold were tracking the prices of gold and silver lower.Centamin was also being pressured lower after Numis Securities cut its recommendation on the stock from 'buy' to 'hold', saying that it will be challenging for the Egypt-focused gold miner to hit its full-year output target.Just Eat was a heavy faller as the stock gave up some of the gains it made on the back of an impressive first-half report earlier in the week. The shares were down over 5% on Friday but still up over 21% on the week.SVG Capital also fell sharply after the stock finished at a two-month high of 429.5p on Thursday. After markets closed it was reported that private-equity firm Permira Holdings sold a 5.7% at a price of just 390p a share.FTSE 250 - RisersAfren (AFR) 102.50p +5.24%Genus (GNS) 1,105.00p +3.56%Imagination Technologies Group (IMG) 191.40p +3.46%Premier Oil (PMO) 336.80p +3.15%Big Yellow Group (BYG) 540.00p +3.05%Ocado Group (OCDO) 346.50p +2.97%Ted Baker (TED) 1,776.00p +2.96%COLT Group SA (COLT) 145.00p +2.91%Telecom Plus (TEP) 1,515.00p +2.85%Computacenter (CCC) 627.50p +2.78%FTSE 250 - FallersJust Eat (JE.) 248.00p -5.34%SVG Capital (SVI) 412.90p -3.87%Hochschild Mining (HOC) 163.40p -3.31%Centamin (DI) (CEY) 67.65p -3.22%Carillion (CLLN) 338.40p -2.42%African Barrick Gold (ABG) 249.80p -2.04%Millennium & Copthorne Hotels (MLC) 591.00p -1.91%Petra Diamonds Ltd.(DI) (PDL) 195.20p -1.86%Spirent Communications (SPT) 101.70p -1.55%Stock Spirits Group (STCK) 294.00p -1.24%BC