Pacific Advisors Small Cap Value Fund ( PASMX), with $73 million in assets, has a 19.8% gain in the past month, getting a boost from Kirby ( KEX), which operates the largest fleet of tank barges in the U.S. inland waterways, up 14.4% this month; Conn's ( CONN), a home-appliance retailer operating over 50 stores in Texas and Louisiana, up 17.8% this month; and Amerigon ( ARGN), a maker of high-technology electronic systems for auto and truck manufacturers, up 16.6%. Another in the same category of funds is the $55 million Dreyfus Small Cap Fund ( DSVAX), with a 19.6% return in the past 30 days, although it's off 9.4% this year. Dreyfus Small Cap has benefited from the recent gains of ScanSource ( SCSC), a distributor of automatic-identification and point-of-sale products, including bar-code printers and scanners, which is up 25% in the past month; DealerTrack Holdings ( TRAK), a provider of on-demand software and data services for the car-retail industry, which gained 30% this month; and GeoEye ( GEOY), a provider of satellite imagery and image-processing services and products, which gained 29%. BlackRock Energy & Resources Fund ( SSGRX) is the biggest among the top-performing funds over the past month. It has $1.1 billion in assets and a 19% advance, but it's down 6.9% on the year. This fund has an amazing 10-year annualized return of 18%, versus 3.5% for the S&P 500. Its big winner of late is Alpha Natural Resources ( ANR), the biggest holding at 9%, a stake almost double the size of the second-largest holding. Although it's down 58% this year, the stock gained 17.5% in the past 30 days, including 19.6% in the past week.The second-largest fund holding is another coal miner, Consol Energy ( CNX), up 18.4% this month. Fidelity Select Energy Fund ( FSENX), with $1.9 billion in assets, is up 17.4% in the past 30 days, mostly on the back of big oil. Its largest holding, at 11.8% of the fund, is Chevron ( CVX), which is up 16.8%, while its second-biggest holding, at 11.3%, Exxon Mobil ( XOM), has gained 12.3%. The No. 3 position, oil-services provider Schlumberger ( SLB), gained 17.5%. On the flip side, the worst performers over the past 30 days are a mixed bag, with a smattering of health-care funds that stand out. The biggest laggard, with a 9.6% loss over the past month, is the $5 million Ram Small/Mid-Cap Fund ( SMBOX). It's down 11.3% this year. The fund's worst performers include its two largest stock holdings, and both are pawnshop operators: EZCorp. ( EZPW), down 7.4%, and First Cash Financial Services ( FCFS), which has lost 4.7% this month. Fidelity Select Medical Equipment and Systems ( FSMEX), a $1.3 billion fund, with a 0.77% gain in the past 30 days, is the largest fund among the 10 worst performers. It's little changed this year. Its largest holding, at 15.7% of the fund, is drug-therapies developer Baxter International ( BAX), which is down 1% this month, while medical-device maker Boston Scientific ( BSX), its third-biggest holding at 6.3%, lost 7.9%. Another top holding, Edwards Lifesciences ( EW), is down 3.4%. The second-worst performance in the past month was by the $27.4 million Huntington New Economy Fund ( HNEAX), which lost 4.1% of its value. Among its poorest performers was its third-largest holding at 3.6%, Green Mountain Coffee Roasters ( GMCR), which is down 37.7% in the past month, and its second-biggest holding, also at 3.6%, Westport Innovations ( WPT), a maker of natural-gas engines, which fell 5.7%.