YT
142 posts

YT
@YuanmingTang
quant trader, picker of low hanging 🍎, babysitter of quote machine, fitter of volatility surface, hft, market microstructure
San Diego, CA Katılım Eylül 2020
1.1K Takip Edilen227 Takipçiler
YT retweetledi

@HedgieMarkets which retail brokerages offers portfolio margin and let people take out collateral?
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🦔Affluent investors are using "box spread" loans to borrow against their portfolios at rates near Treasury yields without selling assets or going through banks. Tony Yang borrowed $650,000 at 1.6% for five years in 2021 to fund a Bay Area home down payment, well below his mortgage rate. SyntheticFi, the fintech he co-founded, has seen box spread loans surge over 10-fold this year.
How It Works
A box spread uses options to create a loan. You combine two opposing options positions to receive cash upfront and agree to pay a set amount at maturity. The gap between what you receive now and repay later determines your interest rate, currently about 5 to 20 basis points above Treasury yields. For a one-year $100,000 loan, box spreads cost 4.03% versus 8.55% for traditional pledged asset lines. There's no credit check, you just convert your investment holdings into cash while staying invested in the market.
The Risk
If stocks fall, your collateral value drops, triggering margin calls. If you can't post more collateral, your portfolio gets liquidated. The frictionless money becomes forced selling. One fund manager notes these strategies get popular during bull runs, but if there's a sharp decline, they become sources of forced deleveraging.
My Take
As I see it, this is leveraged investing repackaged as personal finance innovation. Box spreads let you borrow at 4% against your portfolio rather than sell, keeping full market exposure while extracting cash. This works brilliantly in bull markets but creates forced selling during downturns when margin calls hit. When box spread loans surge 10-fold while markets are at records, that's people leveraging into stretched valuations. I remember 2021 when Yang made this trade at 1.6% rates with the S&P near 4,000. Now the S&P is at 6,800 and people are doing the same thing at 4%. This democratizes institutional leverage for affluent investors, which means democratizing the liquidation risk when markets correct. It's another data point showing speculation building through financial engineering.
Hedgie🤗

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@CL207 When I was at Jump, one team held their gold futures until expiry and had to take physical delivery of 10 tons of gold to their office
The cofounder Bill shut down their desk until they physically carried every bar to sell at a pawn shop, took a whole week, true story
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We invited @dwarkesh_sp to tackle a foundational question in quant trading: What does it take to build a predictive signal from market data?
We loved showing him what makes work at HRT so fun — and why, in Marc’s words, “it occupies a lot of very smart people for years.”
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Thrilled to have presented three case reports at #ACC25 and learn more about the latest in cardiology @ACCinTouch @AlTurkMD @siusom_IM @SIUcardsfellows

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@__paleologo Harry Potter and the Prisoner of Azkaban
Percy Jackson and the Last Olympian
Advances in Financial Machine Learning
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