Quote from cdcaveman:
so does the curve in term structure effect etf pricing?
There are basically four different kinds of ETFs:
1:1 --> If the underlying falls (or rises) by 1% in a day, the ETF will fall (or rise) by 1%
-1:1 --> If the underlying falls (or rises) by 1% in a day, the ETF will rise (or fall) by 1%
2:1 --> If the underlying falls (or rises) by 1% in a day, the ETF will fall (or rise) by 2%
-2:1 --> If the underlying falls (or rises) by 1% in a day, the ETF will rise (or fall) by 2%
Of course the correlation is not that precise, since the management fees are built in the price, but other than that, you can basically trade them like stocks: you pay the commission and the spread. I recommend using them if you have a small account and you cannot afford the margin requirement of the futures contract. If someone wants to trade futures and have a well-diversified portfolio, I would say that the minimum account size should be $50.000. Since there are a lot of people, who don’t have such an account size, ETFs and options are good substitutes.
Other key aspects in choosing the right etf -->
Mkt cap / Shares: you don’t want to be trading an etf that has an illiquid market --> too large spreads
Exchange: determines when you can trade them (when the Exchange is open)
I would also put side-by-side the chart of Sugar (fut) and the ETF to see whether the correlation really exists
I have collected some etfs (roughly 7 month ago, so mkt cap/shares columns are not precise today) and made a list. I am attaching it to the post for you.
If you have a large account, trade futures or/and options, if not, then ETFs or/and options

Options --> if you have a large account, you can buy expensive ones (ATM, ITM) and sell them naked also (high margin requirement when selling). If you have a small account, you can buy cheap ones (OTM) and sell also, but not naked --> they should be hedged (You sell an OTM option x distance from spot price and buy an OTM option x+y distance from spot price).
ITM = in the money option (delta > 0,5)
ATM = at the money option (strike price ~= spot price, delta ~= 0,5)
OTM = out of the money option (delta < 0,5)
All the best,
Dunstan