Re:“Buy and Hold” No More: The Resurgence of Active Trading
by JessicaBosworth on Wednesday April 21, 2021 @12:57AM
(#26885579)
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Re:“Buy and Hold” No More: The Resurgence of Active Trading
by baobabKoodaa on Saturday April 10, 2021 @05:52PM
(#26765476)
> It should be noted that while markets may be mostly efficient, I do not think anyone is claiming they are completely efficient.
This is false. Grandparent is specifically claiming that markets are completely efficient. Here is a direct quote: "Whether you're an individual trader or a billionaire hedge fund manager, active strategies lose out to passive ones in the long run."
In addition, many academics are also making this same ludicrous claim.
It should be noted that while markets may be mostly efficient, I do not think anyone is claiming they are completely efficient.
If there are price discrepancies/anomalies, they could be exploited, at least some of the time. It could be that Medallion can find some and exploit them, say, 55% of the time. But over a large volume of transactions.
Casinos make huge profits by exploit small house edges in volume:
* https://wizardofodds.com/gambling/house-edge/
There's a reason why Medallion has been closed for years: the (possible) market inefficiency exploits they're using may not scale.