Andreas Park PRO
Professor of Finance at UofT
Instructors: Andreas Park & Zissis Poulos
Rotman – MBA
Challenges
Source: Cambridge Bitcoin Energy Consumption Index https://cbeci.org/
Root Problem
Solutions
https://blog.stephantual.com/what-are-state-channels-32a81f7accab
Transaction Processing
Disclaimer: token design strongly influenced by yours truly
going back to Budish (2018)
Serial Chain
Conflux Chain
In Conflux, withholding a block leads to greater anti-cone size
Intuition: Anticone = blocks created without properly referencing others blocks in its vicinity
Where to add a new block B7?
My personal problem: I have not yet seen a convincing theoretical model of PoS
economic result: Fahad Saleh (2021) Review of Financial Studies, "Blockchain Without Waste: Proof-of-Stake" shows that PoS is an equilibrium
current state:
transactions per second | T per 12 hours (business day) | |
---|---|---|
Bitcoin | 7 | 302,400 |
Ethereum | 30 | 1,296,000 |
Algorand | 2000 | 86,400,000 |
Conflux | 4000 | 172,800,000 |
Athereum | 5000 | 216,000,000 |
Payments Canada ACSS | 648 | 28,000,000 |
US retail | 7639 | 330,000,000 |
Canada number of equity trades | 46 | 2,000,000 |
Orders on Canadian equity markets | 3588 | 155,000,000 |
Tweaks: lighting network (BTC) or side chains, SegWit, blocksize possible, but there are limits
microtransactions, IoT, and other smart contract use cases place very high demands
What can it for finance, what are problems and obstacles?
Sue wants to sell ABX
Bob wants to buy ABX
sell order
buy order
Clearing House
Stock Exchange
Broker
Broker
3rd party tech
custodian
custodian
record beneficial ownership
central bank for payment
Evolution
vs
"Let me just say how impressed I am with Ethereum...If Bitcoin is email ––a one-trick pony, so to speak, but obviously revolutionary–– Ethereum goes far beyond that; it's more like the Internet...The whole idea of DeFi really is, number one, it’s obviously revolutionary, and I think at the end of the day could lead to a massive disintermediation of the financial system and the traditional players."
Heath P. Tarbert, CFTC Chairman, October 2020
moving value (remittances)
digital money: real-time settlement, reduced reserves
tokenization of assets
automization of contract payments
securitization
systems and infrastructure reorganization
digital identity
new forms of financial contracts, assets, and forms of financing
Private Sector Solutions
Who gets to update?
Can a higher body prevent
transactions?
Can the past be altered?
consensus
immutability
censorship resistence
open to anyone
no one can be excluded
past cannot be changed
high visibility of transactions
open-access eco-system
slow governance
privacy only at a cost
joint control and governance
straightforward KYC and AML
tech support
transaction secrecy simpler
rely on corporate development
compliance with law (reversion)
can keep competition out
Enter BigTech
cellphone data from 2018 (NewZoo), inflation from 2020 (World Population Review)
Evolution
DIEM = "new financial infrastructure"
They have ZERO interest in becoming a financial institution/bank
\(\rightarrow\) no expertise
\(\rightarrow\) competitive market
\(\rightarrow\) one of the most regulated business environments
They are trying to deal with frictions that impede their business
They aim to collect data which will vastly improve their business
Lay the groundwork for the next step of the digital evolution: the "Metaverse"
5-minute version:
Finance, Metaverse, and Non-Fungible Tokens
metaverse =
marriage of the digital and physical world
sale price: $69,000,000
Decentraland: a digital world owned by its users
What is an NFT?
Why bother with an NFT?
Metaverse application
Related Development: Central Bank-Issued Digital Currencies
Evolution
CBDCs
Source: CBDCTracker.org
Risks and open problems
Investor
Broker
Venue
Settlement
Exchange
Wholeseller
Darkpool
Internalizer
Venue
Settlement
Investor
On chain
Technology
Legal/Regulation
Economic functions
interoperability
cybersecurity and privacy
functionality
scalability
smart contract features and verification
space constraints
interoperability
scalability
space constraints:
Does the law have to change to accommodate new tech? If so, how? What's dated, what's not?
Legal setup of a platform: what rules can, should, and must a platform establish? What regulations are necessary?
How can token design and the law be married?
What is the economic impact of "tokenizing everything"?
How will it affect investments and investment banking?
Which business opportunities will it enable?
What do tokens and "alternative money" mean for payments?
How does it all work and why?
A deep dive into the "How?"
Cryptography: only Sue can spend her money
Problem: double-spending
How can we trust that
Contains transaction from Sue to Bob
Question: Can Sue rewrite history?
Where to add a new block B7?
Contains transaction from Sue to Bob
Sue wants to undo the transaction by rewriting history with B6
Sue's objective
What does it take?
How does Proof of Work prevent this?
Back of the envelope calculation
Double spend attack prevention
Basic idea of competitive equilibrium
aggregate mining cost = aggregate reward
Double spending attack
condition that prevents it
(Chiu & Koeppl RFS 2018)
How do you agree though that something happened, or, what is consensus?
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Equilibrium
Blockchain requirement
Time for a blockchain demo...
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consensus is reached if hash starts with right number of leading zeros
blockchain is a transformative technology, but won't be used in practice overnight
many conceptual and technological challenges remain, but there are already various areas of application
legal, regulatory, and competitive changes are needed and then the opportunities are endless ...
it will open up the banking world further, foster international competition, and change how we pay and exchange value
My view: business development will happen in private/semi-public space; strong increase in recent activity; no more testing but re-engineering of processes.
@financeUTM
andreas.park@rotman.utoronto.ca
slides.com/ap248
sites.google.com/site/parkandreas/
youtube.com/user/andreaspark2812/
By Andreas Park
This is the slide deck that I use for a quick introduction to the Decentralized Finance class.