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C M Nafi

Translating between institutional capital and the software that runs it—and writing about the businesses, filings, and last-over chases that catch my attention.

Solutions Engineer at Dasseti in institutional fintech. Previously BlackRock in asset management, Mayo Clinic in healthcare and research, and SkyBridge in alternative investments. I attended Rangpur Cadet College and UWC Changshu before studying data science at Luther College.

Workbench

Small tools that grew out of my story: the investment filings behind my day job, and the cricket I play on weekends. Two of them run right here, so you can try them before clicking through.

From the day job Look inside an investment adviser’s SEC filing

Projects: see this tool alongside the rest

Every SEC-registered investment adviser files a Form ADV: how much it manages, for whom, and how. Reading these filings is where due diligence starts. It is the work my clients at Dasseti do, and the work I first did screening hedge funds at SkyBridge. Pick a firm, or compare BlackRock with Blackstone, the two names I once mixed up.

Filing snapshot

BlackRock Fund Advisors

CRD 105247 · SEC file 801-22609 · San Francisco, California

Regulatory assets under management, Item 5.F $4.28T $4,282,224,366,957

Discretionary 100% Non-discretionary 0%

Accounts
556
Employees
128
Non-U.S. clients
0%
Fee arrangements
Not in this snapshot

Client types by regulatory AUM, Item 5.D

  • Investment companies $4.28T 99.89%
  • Pooled investment vehicles $3.21B <0.1%
  • State or municipal government entities $1.37B <0.1%

One of several BlackRock advisers; BlackRock Financial Management, Inc. (CRD 107105) files separately. The Universe of Form ADV lists this entity at $3.05 trillion from an earlier bulk snapshot; this card uses the October 2, 2026 filing.

Other-than-annual amendment, filed Oct 2, 2026. Read from SEC IAPD on Oct 14, 2026. Open the filing · I Applied to Blackstone. I Interviewed at BlackRock.

From the weekends Set the field in three of my matches

I play league cricket across Tampa Bay and bowl right-arm fast. Each scenario is built from one of my match reports, like seven runs to defend in the final over. Move the fielders, check the field is legal, then compare it with a suggested one.

Leg side Off side 1 2 3 4 5 6 7 8 9
Inside the circle Outside the circle Rope left open Drag a fielder, or focus one and use the arrow keys (Shift for bigger steps).

Oct 1, 2024 · SWAT vs Royal Phoenix

Seven to defend

Final over · 16 overs a side

Royal Phoenix are 89/4 chasing 96. Seven needed from the last six balls, and Nafi has the ball.

Protect the boundary, or keep catchers in play?

From the match report
  • SWAT made 95/6 in 16 overs; Nafi scored 29 off 24.
  • Amit Saha was still in on 44 and looked the batter most likely to take the game away.
  • Wides in the middle of the over left Royal Phoenix needing 4 from 2.
  • Amit Saha tried to force it and Sourabh Chandran took the catch; the last ball, full and straight, was a dot.

SWAT won by 3 runs.

Read the match report

Outside the 30-yard circle 4 / 5 allowed
Behind square on the leg side 1 / 2 allowed

Legal field

Boundary protection 59/100
Single prevention 60/100
Simple heuristic, not a model. How it’s computed

A simple heuristic, not a statistical model. From the striker we sweep 72 shot directions, weighted toward straight and leg-side hits (an assumption). A direction counts as guarded when a boundary rider stands within about 14° of it (fading to nothing by 32°) for boundary protection, or a ring fielder 8 to 36 yards from the bat stands within about 16° (fading by 34°) for single prevention.

Rules shown: standard T20 fielding restrictions (at most 2 fielders outside the 30-yard circle in the powerplay, overs 1 to 6; at most 5 after it) and Law 28.4 (no more than 2 fielders behind square on the leg side). League playing conditions, and shortened matches, can differ.

Captains View Fielding Style Playbook

  1. 1 Point in
  2. 2 Cover in
  3. 3 Mid-off in
  4. 4 Mid-on in
  5. 5 Square leg in
  6. 6 Deep cover out
  7. 7 Long-on out
  8. 8 Deep midwicket out
  9. 9 Fine leg out

  • Worldview

    An atlas of everyday choices. Pick one and follow it into psychology, culture, ethics and the research behind them: the reading habit from Dinajpur, made clickable.

    Updated

  • CAIA Knowledge Hub

    SkyBridge was my first close look at hedge funds and alternative investments. This hub maps that world, CAIA Levels I and II, in plain notes.

    Topic notes, formulas and a glossary

  • Explore all projects in the Workbench

Writing

Long-form pieces on how capital actually moves. Every big number has a story behind it.

Deep dives

Deep Dives · Venture Capital

Uber: The $32.8 Billion Hole

Uber burned through more outside capital than any startup before it, dug a $32.8 billion hole, and then refilled three quarters of it in 42 months. The full funding history, round by round.

20 min read

  1. The Open Syllabus: 55 YouTube Channels, Eight Tracks, Five Hours a Week

    YouTube holds more good teaching than any campus, and no way to find it. Not a list of channels but a curriculum: eight tracks, 55 channels, and a 300 minute weekly budget.

    Books 9 min read

  2. The Universe of Form ADV

    An empirical review of 56,000+ SEC registered advisers, $163T in assets, and their institutional holdings.

    General 12 min read

  3. The Smaller Company: Inside GameStop's $55.5 Billion Bid for eBay

    How a 41-year-old mall retailer with a $9 billion cash pile decided to take over a 30-year-old auction house worth four times as much.

    Public Equities 15 min read

  4. Last Stop: How America Tore Up 50,000 Miles of Streetcar Track for $5,001

    The rise, fall, and afterlife of the American streetcar: from Frank Sprague's 1888 demo in Richmond to a $5,000 fine that helped reshape a continent.

    Macro 12 min read

  5. The Money Lines: Inside Twelve Sports' 2025 Cash Flows

    Twelve sports. Roughly ninety billion dollars in distributable revenue. We trace every flow from broadcasters to players.

    General 12 min read

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Essays & Notes Deep dives, book notes and match reports Shortcut: F
Story Dinajpur, Changshu, Iowa, Florida Shortcut: S
Connect Email and where to find me Shortcut: C
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