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Recently, as international oil prices have been fluctuating, more and more people are looking for products related to the idea of ​​one day rising or falling. There are such ETNs and ETFs that are traded as stocks on the stock market, and there are many people who invest in products that can expect profits, especially according to the movement of the crude oil futures index. The financial authorities issued a consumer warning saying it was dangerous.

Reporter Chan-Keun Park will tell you why.

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Particularly of concern is the ETN, which has the name 'Leverage' and works with the crude oil futures index.

You can see losses or gains as much as twice the fluctuation of the underlying crude oil futures index.

Indeed, investors who expected international oil prices to rise someday bought large quantities of crude oil futures ETN.

From the beginning of last month, only the amount of net purchases by individuals is close to 620 billion won.

With the 'Do not ask investment', some leveraged ETN products linked to crude oil futures have soared to 10 times the fair value.

In the long run, even if the price rises temporarily, it will converge to a fair value in the long run, so in the end, some of these product investors can make a big loss.

On the other hand, securities firms that are obliged to maintain a reasonable price can profit from the overheating atmosphere.

This is because when additional ETNs are issued and listed, investors buy at market prices that are much inflated.

[Investors in crude oil futures-linked products: Consumers suffered so much, and some other companies said that they also earned a bit, so it's a little frustrating.]

Financial authorities are at the highest risk level for ETN and ETFs related to crude oil futures . Has issued its second consumer alert.

(Video coverage: Seungwon Park, Video editing: Jinhoon Park)