The idea of buying low and selling high has been a tried and true idea on Wall Street for quite a while. It's turned many a junior investor into a fancy-suit wearing, Grey Poupon-eating fat cat with superiority issues.
The idea works in fantasy football, too. Although, if done successfully, it won't change your wardrobe and you'll still be lathering French's Spicy Brown on your hot dogs, but you could end up with a better fantasy team.
Pulling it off is tricky, since many owners are reluctant to trade a disappointing player they spent a high draft pick on. But if you need some help for your team – and who doesn't at this point in the season – here are some buy low and sell high candidates.
1: Ryan Matthews, RB, Chargers. Preseason tea-leaf readers predicted superstardom for Matthews. Just what kind of leaves were in their tea? He's been hurt and has been slow to get started. But if you can pry him off another lineup, he's got some run-friendly matchups on the horizon.
2: Steve Smith, WR, Panthers. He's been at the mercy of an inconsistent Cam Newton thus far. But I'm betting on the coaching staff using the bye week to slap some sense into Newton's apple. It doesn't hurt that four of the Panthers' last seven opponents rank 20th or lower in pass defense. And Smith is Newton's go-to guy.
3: Darren McFadden, RB, Raiders. Another top-10 RB wasting away in Mediocreville. In PPR leagues he's had some value, but if you don't count receptions, McFadden's not done much. Many folks are still waiting for his annual injury to occur as well. If you're a gambler, make a play for McFadden. His upcoming schedule is full of porous defenses.
4: Chris Johnson, RB, Titans. He carries more risk that Matthews and McFadden because the Titans ditch him the moment the team falls behind. And this team will fall behind. But in the Titans' remaining 10 games, Johnson will face six run defenses ranked 26th or lower.
1: Stevan Ridley, RB, Patriots. Ridley's not likely to disappear. He's the Pats best RB. But New England caters the offense to the game and situation, and there will be times Danny Woodhead or Brandon Bolden will be used more. Ridley's value is high. Cash in on it.
2: Shonn Greene, RB, Jets. Greene's 161 yard, 3 TD performance last week is what biologists call a trematoda -- or fluke. If you expect a repeat from a guy who rushed for 100 plus yards just four times in 47 starts, you need help. Find a buyer now while last week's numbers are fresh in people's minds.
3: Mike Williams, WR, Buccaneers. His 11 TDs in 2010 are still floating around the collective memories of fantasy owners. If his touchdown and 114-yard effort awakens those memories in a trade partner, make the deal. Williams won't be consistent enough to keep.
4: Andre Johnson, WR, Texans. He's been disappointing so far and not a true sell high candidate. The perception of Johnson as a stud WR is greater than reality he ranks 30th among wideouts. Move him on reputation alone and you will get value in return.
Jonathan Dwyer, RB, Steelers. No Mendenhall. No Redman. Jerome Bettis? He has a day job. It's Dwyer who will get the start against a Bengals team that can be run on.
Brandon Gibson, WR, Rams. Don't count on Gibson to be a season-long answer. But for one week, as St. Louis plays catch-up against Green Bay, he makes a good bye fill-in.
Josh Freeman, QB, Buccaneers. The Saints explosive offense means Tampa will have to score a lot to compete. The Saints bad defense means they can.
BenJarvus Green-Ellis, RB, Bengals. He just hasn't been the answer at RB. You can throw on the Steelers, but running is difficult.
Cam Newton, QB, Panthers. There are two teams allowing less than 200 passing yards per game. The Cowboys are one of them. Newton may salvage a nice week with some rushing yards, but that's not a guarantee.
Detroit Lions not named Calvin Johnson. The Bears defense has been the NFL's best so far, and they should contain Matthew Stafford and Mikel Leshoure. Johnson, however, is a force of nature.
RBs who catch passes are valuable fantasy commodities. The usual suspects -- Darren Sproles, LeSean McCoy and Ray Rice -- lead the NFL in catches after week 6. But get ready to add another name to the dual-threat list. Browns rookie Trent Richardson is fourth with 22 receptions.