In the financial markets, HFT and AI have changed the processes of trading to be more fast and efficient. Yet such advances are also wrought with real threats, particularly in periods of market turmoil. This essay will cover three main topics: How AI-based systems and HFT adds to systemic risks, regulation and innovation, and the ethics of AI trading, particularly when humans are not at all controllable.
Algorithmic trading, specifically HFT, is geared to exploit price variations of just a millisecond in magnitude, and will make thousands of trades per millisecond. Such velocity can drive volatility, creating systemic risk when markets are in distress (Bartholomeusz 2024). For instance in the "Flash Crash" of 2010, the Dow Jones Industrial Average lost nearly 1,000 points within minutes of the incident, and was repaid the entirety of the loss within minutes. The process was aided by algorithmic trading algorithms, which during market instability would instantly make automatic trades, causing trade volume to explode and prices to fall.
Artificial intelligence systems add to the difficulty. AI is able to pick up on trends and make trades more rapidly than humans but AI’s decisions are also opaque, making them difficult to predict and manipulate during crises (Demetis& Allen S., 2018). AI isn’t the same as algorithms; it’s a machine learning system that adapts to market stress, and so its response may be random. This leaves us with the key question: can AI-powered trading be programmed to stay away from crashes? It’s not a simple answer. AI might be set up with risk-adjustment rules that automatically stop trading if market conditions become unusual, but as AI is always evolving, it may also be inadvertently increasing volatility by exaggerating market conditions instead of attenuating them.
The volatility reduction resulting from high frequency trading comes with a cost. HFT adds liquidity by getting transactions completed quickly, but the same time it increase volatility if market spikes. Here, latency and speed are important. The faster the trade, the higher the chances are small market mismatches can be exaggerated causing unforeseen market movements. Second, the increasingly advanced systems of HFT – brought on by the advent of AI – make it difficult to recognize and prevent systemic risk before it’s introduced. The Knight Capital glitch in 2012 caused by a bug in the HFT system, for instance, cost the company $440 million in just 45 minutes, which really shows just how unmanageable such systems are (Demetis& Allen S., 2018).
The regulatory framework of HFT/AI in financial markets is always changing. Regulations should seek to ensure market stability but they must not eliminate innovation (Hsu et al., 2024). Current rules — including short-selling restrictions and HFT registration requirements in Asia — do a tentative balance. But whether they’re enough is an open question.
Market bans on short-selling – usually introduced in crashes to stave off market sentiment – can offer temporary comfort but hinder the discovery of prices and market efficiency. HFT registration and AI regulations in Europe, however, seek to be more transparent and less risky, but potentially stunt innovation by overburdening upcoming technologies. The regulators’ task is to design a system that minimises the harm of HFT and AI without reducing their opportunities.
The answer could be real time tracking and AI derived regulatory surveillance, also known as "regtech". Regtech can also use AI to track the movement and spot the erratic nature or the manipulation in real time, which keeps the innovation/stability ratio within check. And with the adoption of AI in financial markets, regtech has to catch up to keep up with the changing pace. Artificial intelligence’s ability to both regulate and engage in the marketplace is a curious trade-off regulators have to navigate.
A number of ethical issues emerge in relation to HFT based on the application of AI: market fairness and transparency are major ones. AI’s ability to surpass the speed and data storage of human traders introduces market participation imbalance. Individual investors and smaller firms that don’t have access to the same technological platform are severely excluded, and markets increasingly driven by AI aren’t proving to be fair.
In addition, when AI algorithms make choices without much human intervention, responsibility is undefined. If artificial intelligence-based trading systems sway markets and suffer market crashes or misrepresentation, who pays? Or developers, the company selling the technology, or the algorithm itself? Laws are now poorly equipped to attribute liability where AI decisions have negative consequences, leaving an accountability gap that must be closed (Schlaepfer 2024).
Eroding trust in market integrity is another serious concern. With human traders replaced by AI trading platforms, the perception of a level playing field might discourage retail investors from participating in the market and undermine market confidence and interaction (Schlaepfer 2024). Moreover, the opaque nature of AI decisions might exacerbate this mistrust. But while human traders might have reasoned rationally based on market information and common sense, AI is driven by algorithms that aren’t easy for the human traders to comprehend.
In a way, high frequency trading and AI have definitely changed the face of finance, creating new spaces for efficiency and gain. But such developments carry tremendous dangers, especially in the face of market anxiety. AI systems and HFT can exacerbate volatility, threatening market stability and justice.
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