About

Built by a trader,for traders.

Convexity started because the founder was paying $180 a month across five trading tools, and wishing it was one app with one login.

The monthly cost that started it

MONTHLY · RESEARCH STACKa typical retail stack · representative split
Monthly Expensesresearch & trading stack · representative
  • real-time market data$25
  • screener$40
  • options flow$50
  • news terminal$35
  • charting$30
total / month~$180
why convexity exists · one terminal · $29/mo

What Convexity is

A financial intelligence terminal for active traders and independent analysts

Real-time market data, SEC filings, insider flow with signal classification, options activity, macro data, and AI-powered research, consolidated into one interface.

What Convexity isn't

Not a brokerage. Not an investment advisor. Not a Bloomberg replacement (yet). We focus on US equities, options, and macro. If you need FX, fixed income, or derivatives pricing, traditional terminals are still the right tool.

Six months of nights and weekends.

  1. 100+ data feeds, one pipe

    Market data, SEC filings, insider flow, options activity, and macro series, consolidated behind a single login.

  2. AI synthesis with citations

    Answers grounded in primary sources, with the citation attached so you can verify every claim.

  3. Persistent signal detection

    Insider signal classification and the operational infrastructure to keep it all running, every night.

Solo. Intentional. Shipping.

Built by Garrett, a solo founder shipping at a pace that would normally require a team. Based in the United States.

Two convexes for the curvature of bond pricing.

Convexity, in fixed income, is the second derivative of price with respect to yield, the curvature in a bond's price-yield relationship that duration alone can't capture.

Each arc in the mark is one of those curves. Two convexes, mirrored, intersecting once. They're not letters. They're the shape that bond prices actually trace when interest rates move, and the shape of every non-linear signal we try to surface in the terminal.

Fixed income · Convexity = ∂²P / ∂y² · the bend in the curve, not the slope.
Anatomy of the Convexity mark: two mirrored convex curves crossing exactly once, with their Bezier control cages shown.

The geometry

Drawn on the golden ratio.

Each curve forms one side of the φ ratio: 1 : 1.618. The two arcs sit in mathematical balance, the way a well-priced asymmetric bet sits in a portfolio.

Tools that look like trading screenshots aren't the goal. We wanted a mark that you could draw with one rule and a compass, something that would still feel right on a favicon, an email header, or a 4×4-meter wall. Geometry over decoration.

φ ≈ 1.61803 · the ratio that makes Fibonacci, parthenons, and bond convexity all feel correctly proportioned.
The Convexity mark: two convex arcs forming an X
96 · 48 · 24 · 16 px · one file

Why "Convexity."

In a portfolio, convexity is the cushion. It's what makes a position respond more when conditions improve and less when they worsen, the structural quality that linear sizing misses.

Most retail tools are built for linear thinking: a screener returns a list, a chart returns a line, a feed returns a stream. We're trying to surface the second-order signals (clusters, regime changes, concentration risk, asymmetric setups) that show up in the curvature, not the level.

Convexity, the product, is named for what we're trying to measure.

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