When the entire mutual fund industry is up in arms about a new form of ETF, should investors take note? You bet they should.

There's an interesting article over on SeekingAlpha by HardAssetsInvestor. The article focuses on the Exchange Traded Note product, something I've written about previously. The ETN is similar to an ETF in that it's a fund that trades like a stock. Unlike ETFs though, the ETN is not backed by the underlying assets. Rather, it's a zero-coupon note (essentially, a bond) that's backed by its underwriters. So, it throws an added layer of default risk into the whole investment game.

Where things get even more interesting is the tax treatment of the ETN product. Says HardAssetInvestor's Brad Zigler, "No tax consequence befalls the noteholder until the security is liquidated or matures. Taxes during the holding period? Zip. Nada. Bupkis. That beats the heck out of the tax treatment of mutual funds, too, which distribute income and capital gains." Unlike ETFs investing in commodities which are treated with a complicated tax structure on the futures the funds invest in, ETNs don't pass these taxes through to investors.

In case you were too busy watching Obama win in Iowa or voyeuring in on Britney's travails, we're in the midst of what some pundits call a "supercycle" of a commodities bull market.

For more on this supercycle, I recommend reading uber-trader Jim Rogers' work on commodities. Jim was, along with George Soros, the founder of the Quantum Fund. He has been pretty accurate with his predictions regarding hard assets and the ensuing demand/supply issues that are being exacerbated by demand from India and China. There's an insightful interview with him here that's really good reading.

From the interview: "Nobody has discovered a gigantic oil field for thirty years. That's not a theory; that's a basic fact. In the meantime, demand for oil has been going up for many years. That's not a theory, either; that's a simple fact. Likewise, there has been one lead mine open in the world for the past twenty years, and the last lead smelter was built in the U.S. in 1979. I could continue: the number of acres devoted to wheat farming has been declining for 20 years.