RWM vs SARK

RWMBProShares Short Russell2000

SARKCTradr 1X Short Innovation Daily ETF

In short

RWM Short small caps at one speed: RWM targets the inverse of the Russell 2000's daily move, with no 2x or 3x multiplier on top. Trading since 2007, at 0.95% net of a waiver through September 30, 2027.

SARK The original anti-ARKK trade. Launched in 2021 as the first US ETF built to short another ETF, SARK uses swaps to aim for the inverse of the ARK Innovation ETF's move over a single day, then resets overnight. A trading tool, not a hold.

Stated mandate

RWM The fund seeks daily investment results, before fees and expenses, that correspond to the inverse of the Russell 2000 Index's daily performance.

SARK The Fund seeks daily inverse exposure to the ARK Innovation ETF for one trading day, using swaps and daily repositioning. It is intended for sophisticated, actively managed trading or hedging strategies.

Why people hold it

• RWM Straight -1x, not a multiplier: it tracks the inverse of the Russell 2000's daily move, where stablemate TWM targets -2x on the same index.proshares.com
• ProShares calls it the only -1x ETF tied to the Russell 2000, the index of the 2,000 smallest US names in the Russell 3000.proshares.comproshares.com 2
• Trading since January 2007 and one of the busier funds in the inverse-equity aisle, so entering and exiting is rarely the hard part.
• Fee is 0.95% net of a waiver through September 30, 2027 (1.05% gross), near what this category charges, and it rates among the strongest builds in its peer group.

• SARK First of its kind: at launch it was the first US ETF offering short exposure to another ETF, and it still delivers that exposure through swaps rather than a margin account and borrowed shares.sec.govwikipedia.org
• One job, done tightly: daily inverse exposure to the ARK Innovation ETF, and it has stayed close to that one-day target. That lands it in the upper half of a crowded inverse field.
• Costs 0.99% a year, with no waiver propping the number up, which sits near the category median for inverse funds. Index shorts like PSQ and DOG aim at benchmarks; this one aims at a stock picker.

Worth knowing

• RWM The -1x target resets daily. Hold longer and compounding rules: ProShares says multi-day returns can differ significantly from the target, in amount and even direction.proshares.comproshares.com 2
• Symmetric by design: on days the Russell 2000 climbs, the fund is built to lose roughly as much as the index gains.proshares.com
• Fund documents tell investors to monitor holdings as frequently as daily, which puts this at the hands-on end of the shelf.proshares.com

• SARK The clock resets every session. Hold past a day and the path of ARK Innovation's moves, not just its direction, shapes your result.tradretfs.com
• Exposure comes from swap contracts with financial institutions, so counterparty risk rides alongside market risk.sec.govtradretfs.com
• The target moves. You are positioned against an actively managed portfolio whose holdings ARK can reshuffle, so what you are short today may not be what you are short next quarter.wikipedia.org

Full RWM profile⁠

Full SARK profile⁠