Things that go bUmP in the night...28 Jan 2022 17:37
Chart here:
https://twitter.com/DuncanLamont2/status/1486979500634165248
Story here:
on.ft.com/3KQDXre
Summary:
An ex-hedge fund analyst has a conspiratorial theory why equities do better after the market closes
American bourses officially open between 9.30am and 4pm in New York, yet weirdly most of the gains actually accrue in the sparser, more informal after-market trading that happens on various electronic exchanges, according to a study by the New York Federal Reserve. Early morning returns, on the other hand, tend to be negative. The phenomenon has long puzzled many analysts.
It gets weirder. Research by Bruce Knuteson, a former quantitative analyst at the hedge fund DE Shaw, indicates that “overnight drift” and “intraday reversal” also happens in international markets, from Japan to Norway. Knuteson also has a far more controversial, conspiratorial interpretation of the pattern than other researchers who have probed it over the years. He reckons that it is caused by systematic market manipulation on a Herculean scale by some quantitative hedge funds.
Here is how Knuteson thinks it works. “Quant” funds that use algorithmic or systemic strategies take advantage of the bigger impact that trades can have when markets are closed and liquidity is thinner. They aggressively buy shares they already own, driving their price higher.
Then, as markets open and trading conditions improve, they can gradually ditch the purchases without undoing all of their earlier impact. By the end of the day, Knuteson says they should be left with a slightly higher-valued portfolio. Systematically doing this, day-in-day-out, would produce the pattern of overnight gains and gentle intraday declines, he argues.
Given his DE Shaw background, Knuteson’s theory is certainly more intriguing than the usual conspiracy theories that clog up the internet.