[kccqzy]

Definitely no. ETFs merely hide the fact that the underlying are futures contracts. ETFs make these futures contracts seem like stocks so any Tom Dick or Harry thinks they understand it and buys them. It's a very leaky abstraction.

> They can't go below 0

One month ago people know that futures can't go below 0. What guarantees ETFs will never go below zero? It's economically absurd to think an ETF holding negatively priced assets will still have positive value.

I would argue that if an investor isn't knowledgeable enough to trade an underlying, the investor shouldn't trade an ETF of these.

[andy_wrote]

The asset value underlying an ETF can be negative, but then the owner of the ETF will just have a worthless piece of paper. The ETF managers will have a problem on their hands regarding the negative amount, though.

In contrast, a futures contract is an agreement to make a future trade, so it can keep going against you past 0. If you are able to take physical delivery, your worst-case scenario is that you pay the money you said you would, and you get your oil. But if you are a casual day-trader type, you probably don't have the ability to take physical, so you may be in trouble (over a barrel, literally).

I agree with you about the dangers of ETFs and about knowledgeability. I didn't mean to advocate for ETFs on an absolute basis, just to make a relative statement about them vs. futures.

[tialaramex]

And as you'd expect ETF managers "fixed" this by shuffling things so that the "same" ETF is now backed by a different mix of futures they're less worried about.

My opinion is that ETFs are legalised bucket shops and ought to go away. The Oil Futures market represents an actual need, Alice wants to sell her oil knowing what she'll get for it when it's delivered in a week's time, Bob wants to be able to lock in today's prices for next week's oil. There is clearly a deal to be made there and if people who don't actually need oil want to tie themselves up in it and maybe improve liquidity I guess I won't stop them. But Oil ETFs are just a way to gamble on the value of the Oil Futures, and that's why we forbade bucket shops. Negative future prices show that the mechanisms which are supposed to make ETFs safer than bucket shops are flawed, and IMO too flawed to continue to accept them as a legitimate business.