Marijuana ETFs are far underperforming the broad market.
AdvisorShares' prospective fund would use same derivative strategy as 'YOLO.'
We look at what does—and doesn't—influence liquidity in marijuana funds.
Weak earnings, corporate scandals and regulatory slow-walking have driven the sector lower.
Bargain price tag helps Cambria's fund stand out in a crowded field.
Nottingham is looking to break into the ETF space at a time when white-label providers are under heightened scrutiny.