>paying what in retrospect will have been an excessive price

This can be said about any negative price movement. You still get the same amount of oil you agreed to regardless of if the price goes up or down afterwards.

It's a tax. I don't know if you specifically are one of the "taxation is theft" types, but it's absolutely wild how many of these are totally cool with the tax if it's funding insider trading payouts but not if it's paying for poor person healthcare or whatever.

In the absence of the insider trader selling you oil futures on the basis of his insider knowledge, what would you do?

You'd buy oil futures at broadly the same price from someone else (maybe a worse price! Because the presence of the insider selling is already driving the price down). So how exactly do you lose?

The only people who lose out are those whose limit orders don't get filled because the insider outbid them. The counterparty benefits from trading with the insider.

This is completely ignorant of market microstructure. For big swaths of the market, most parties interacting with the market do so by trading with a market maker who ensures that everyone's trades clear immediately in exchange for a fee that covers the risk of getting caught offsides. If you're big enough, it makes sense to take that risk in house, but the risk and its very real financial cost remains. In both cases, trades that increase the risk increase the fee. So no, corruption is a tax and everyone pays the tax even though the mechanics have fallen through the rather large cracks in your understanding.

If you think this tax is de minimis, great, glad to hear it, let's put a government tax of similar magnitude in there and resume the peanut butter rations to starving african kids that DOGE cut.

Sometimes trading with people who have better information than you is part of the risk you take on when you run a market-making strategy.

I'd say the entire market loses out on insider trading except for the two parties involved in the insider trade. The insider trades take away a part of the profit margin that other good faith future providers need to justify the risk they take on by offering the futures. This leads to future providers needing to raise the prices of futures to remain profitable.

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If market makers figure out that a handful of market participants are being fed inside information, they’ll widen the bid/ask, leading to increased transaction costs for everyone.

It also discourages speculators from entering trades if they suspect they’ll be run over by insiders trading on non-public information.

Fewer market participants leads to worse price discovery.

It’s probably bad.

Yes but it is being said about a manipulated movement, not any negative price movement.

If a store sells a TV for $500 and they know they are going to run a sale the next day. The next day the customer may feel like they missed the sale, but the TV was still worth >$500 to him else he would not have bought it in the first place.