The Russell 2000 has surged over 10% in July, with theiShares Russell 2000 ETF(NYSE:IWM) and theVanguard Russell 2000 ETF(NYSE:VTWO) gaining 11.27% and 11.36% over the same period.

So, what's behind this recent impressive rally in small-cap stocks? Benzinga spoke withBrian Manby, Associate in Investment Strategy atWisdomTree, to get the exclusive scoop on the factors driving this trend and what it means for retail investors.

Rotation Trade Fuels Small-Cap Surge

The recent rally in small-cap stocks is largely due to a rotation trade rather than specific sector gains. Manby explains, "July's small cap rally...