This article was published as a RealMoney blog on Jan. 25, 2011. After slamming speculators and vowing to curtail large investors with position limits, it seems as though the stalled-out efforts of the SEC and CFTC may end up rusting on the side of the road. Having already talked with CFTC Chairman Gary Gensler, Rep. Barney Frank is now claiming that a fund shortage could short out one of the most sweeping efforts at regulatory change in U.S. history. Derivatives regulation, a topic which I have closely followed on this blog, now falls under the recently passed Dodd-Frank act. While the CFTC and SEC have been talking about placing position limits on commodities contracts for years now, it seemed like this new legislation might finally give these organizations the push they needed to finalize rules and provide clarity for investors. On Jan. 13, proposals on position limits for energy and agricultural commodities contracts were put forth for a future vote. Answers seemed imminent. If Frank is correct in his estimation of the already under-funded regulators, it seems this regulatory quagmire could continue to drag on for years to come. Uncertainty about future regulation has already had a heavy-handed role in shaping the ETF industry. As position limits on NYMEX-traded natural gas futures contracts seemed imminent, managers of the United States Natural Gas ETF ( UNG) switched over to arguably riskier bilateral swaps. Managers of the PowerShares DB Oil ETF ( DBO) diversified their underlying holdings (until then, largely invested in NYMEX-traded oil contracts) by adding Brent oil contracts -- traded abroad. The PowerShares DB Agriculture ETF ( DBA) was also restructured in anticipation of new restrictions on agricultural contracts. All of these changes happened in 2009. The growth of leveraged ETFs -- like the Direxion Daily Financial Bull ETF ( FAS) and the Direxion Daily Financial Bear ETF ( FAZ) -- has also been stifled by the SEC. A notice last spring declared that no new leveraged ETFs that hadn't already been approved could be released into the market until further SEC review. Investors haven't gotten an update on that "review" in almost a year. In the meantime, sensing the demand for leveraged products, ETF issuers have released leveraged ETNs -- exchange traded notes ---in such areas as volatility indexes. While there are arguably structural and tax advantages to the ETN model, these products depend on the credit rating of their issuer - still not a given in current market conditions.