LEON

COEFFECT / JOURNAL

Markets. Machines.
The city after hours.

Latest edition · 23 October 2026

The topic collection

Quant & Markets.

Quant funds, trading firms, market structure and the business of investing.

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148 notes across 44 editions. Dates refer to original publication; prices, events and availability may have changed.

The tape: two kinds of AI finance

Wednesday’s market story was not “AI up” or “AI down.” It was a widening separation between businesses collecting fees from the buildout and securities expected to finance it.

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Listen: Quantedge

Asia Centric — “Inside Quantedge's 49% Surge and 20-Year Run”, Bloomberg Intelligence, October 7 · 19:40.

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Hedge funds are not one trade right now

September split the industry in two. Fundamental equity long/short funds lost about 0.55%, while systematic equity long/short gained about 3.46%, its best month of 2026, according to performance data reported by Reuters.

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