Posts in category: Technology

The Ptolemaic Trading Floor

In the sixteenth century, Copernicus did not discover new stars. He did not build a better telescope. He simply stood in a different place and looked at the same sky – and from that different vantage point, the complexity that had been accumulating for centuries suddenly resolved into something simpler and more true.

The philosopher Thomas Kuhn, writing about this in The Structure of Scientific Revolutions, made a point that has stayed with me. The Ptolemaic astronomers were not stupid. They were brilliant people doing extraordinarily sophisticated work, and their model of the universe – with its epicycles and equants – was genuinely good at predicting where the planets would be. By their own measures, they were succeeding. But the framework was self-sealing. Every anomaly became a problem to be patched rather than a signal that the whole edifice needed replacing. The epicycles kept accumulating.

I recognise that trading floor.

The VAR models, the correlation assumptions, the ratings frameworks that failed simultaneously in 2008 did not fail because the mathematics was wrong within the model. They failed because the model had pre-decided what reality looked like, and reality declined to cooperate. The framework had accumulated its own epicycles – its own patches and exceptions and special cases – and nobody had stood back to ask whether the whole structure still made sense.

This is what the economist Herbert Simon called bounded rationality – the idea that we make decisions within limits of information, time, and cognitive capacity. But I think there is a deeper form of boundedness that Simon’s original formulation didn’t fully capture. It is not just that we lack information within a given framework. It is that the framework itself determines what counts as information in the first place. The boundary is not cognitive – it is epistemological. The frame has pre-decided what reality looks like, and we optimize furiously within it, never suspecting there is anything outside.

This is framework-induced bounded rationality. And financial markets are one of its purest expressions.

The Filmiest of Screens

William James, writing in 1902, described something that has always struck me as one of the most quietly radical observations in the history of psychology:

“Our normal waking consciousness, rational consciousness as we call it, is but one special type of consciousness, whilst all about it, parted from it by the filmiest of screens, there lie potential forms of consciousness entirely different. We may go through life without suspecting their existence; but apply the requisite stimulus, and at a touch they are there in all their completeness.”

James was writing about mystical experience. But I think he was also describing something that every trader knows intuitively – that there are moments of genuine clarity, where the market’s structure becomes briefly, luminously obvious, and then the noise closes back in. Not constant confusion, but brief clarity, constantly interrupted.

What interrupts it? I think James gives us a clue, though the fuller answer comes from a tradition he was only beginning to encounter.

The Deluded Self and the Distracted Market

The Yogācāra school of Buddhist philosophy, developed in the fourth and fifth centuries, offers one of the most sophisticated maps of consciousness ever produced. It describes eight layers of awareness, from the basic sense consciousnesses up through something far more interesting – the seventh consciousness, called kliṣṭa-manas.

Kliṣṭa-manas is the layer of mind whose function is to construct and defend a sense of self. But the Yogācāra tradition makes a more precise and more troubling point than simply calling it deluded. By the time information reaches the seventh consciousness, it has already passed through the sense consciousnesses and the discriminating mind – each stage filtering, selecting, and coloring what gets through. The seventh consciousness is not distorting clean data. It is working with inputs that are already biased, and it has no way of knowing this. It constructs its picture of reality from pre-processed material, and then defends that picture as if it were direct perception. Try telling a QANON follower to get a vaccine jab.

The parallel to institutional behavior in markets is uncomfortable in its precision. Risk committees, house views, investment mandates – these are the kliṣṭa-manas of the trading floor. They exist, at least in part, to protect the institution’s sense of itself. The risk manager who cannot recommend a position that contradicts last quarter’s framework. The economist whose forecast must remain defensible to the committee. The trader who holds a losing position because admitting the loss means admitting the thesis was wrong. These are not failures of analysis. They are the seventh consciousness doing exactly what it was built to do.

And into this environment, the attention economy arrives as accelerant. Social media does not simply distract – it feeds kliṣṭa-manas directly. Likes, outrage, identity, tribal affiliation – all of it strengthens the self-constructing layer and weakens the capacity for clear perception. The signal-to-noise ratio in markets was already difficult. We have now built an entire industrial infrastructure for generating noise that feels like signal, because it flatters the self that is doing the perceiving.

Standing in a Different Place

The Yogācāra tradition does not stop at the seventh consciousness. Beneath it lies the ālaya-vijñāna — the storehouse awareness, a kind of ground-level consciousness before the self-construction begins. It is not a mystical concept, or not only that. It is a description of what perception might be like before the defending ego has finished processing it.

The best risk-takers I have encountered in markets seem to access something like this, in their better moments. A capacity to see the position as it actually is, without the framework that produced it colouring the perception. To hold a view lightly enough to abandon it when the evidence changes. Copernicus looking at the same sky and seeing something different – not because he had more data, but because he had momentarily freed himself from the inherited frame.

James was right that these states are parted from ordinary consciousness by the filmiest of screens. The Eastern traditions – Buddhist and Vedantic – have spent two and a half millennia developing systematic methods for thinning that screen. Western psychology, for all its extraordinary achievements, has been slower to take this seriously, often treating consciousness itself as a problem that better neuroscience will eventually dissolve. It may be that, in this respect, we are in the position of the medieval scholars encountering Arabic science – not lacking intelligence, but working within a framework that makes certain questions difficult to even formulate.

What This Has To Do With FX

Markets are reflexive. The moment enough participants adopt the same model, the model changes the thing it was measuring. The framework that produced clarity attracts capital, the capital erodes the edge, and you need a new framework. Brief clarity, constantly interrupted – not as a pathology, but as the structural condition of the thing itself.

The question is not how to achieve permanent clarity, which is probably neither possible nor desirable. The question is whether we can develop the capacity to notice when we are inside a framework rather than seeing through it – to feel the epicycles accumulating before the model breaks.

That capacity, I suspect, is less a matter of better data or faster processing, and more a matter of the quality of attention we bring to the screen. Which means the most important professional development available to a markets practitioner might not be in a CFA curriculum.

I am aware of the irony of writing this on LinkedIn, which is itself a highly effective delivery mechanism for kliṣṭa-manas. The seventh consciousness is nothing if not adaptive.

Note: The author works in foreign exchange markets and thinks too much.