UK pub group Marston's leads small caps on strong profit outlook

** Shares of Marston's up 10% at 42.7p ** Stock is top gainer on FTSE small cap index (.FTSC), which is up 0.05%** Co expects annual PBT above expectations, as revenue management and operational efficiency initiatives lift margins** Analysts, on average, expect co to report underlying PBT of 67.2 million pounds ($90.01 million), according to a company-compiled consensus** YTD, MARS down nearly 3%, .FTSC up about 7% YTD($1 = 0.7466 pounds)