The Core Concept
On June 13, 2018, a groundbreaking academic paper sent shockwaves through the cryptocurrency world. University of Texas finance professor John Griffin and graduate student Amin Shams published a 66-page study alleging that Tether — a cryptocurrency supposedly pegged 1:1 to the U.S. dollar — was systematically used to manipulate Bitcoin prices during the epic bull run of 2017. With Bitcoin trading near $6,252 on the day of publication, down dramatically from its December peak near $20,000, the paper provided a data-driven explanation for what many in the industry had long suspected: the parabolic rise may not have been entirely organic. The study’s central claim was stunning in its specificity — just 87 hours of concentrated Tether trading, roughly 1 percent of the total observation period, could statistically explain approximately 50 percent of Bitcoin’s meteoric price increase and around 64 percent of the rise in other major cryptocurrencies.
How It Works Under the Hood
The methodology behind Griffin and Shams’ research was rooted in forensic blockchain analysis, leveraging the very transparency that cryptocurrency advocates celebrate. The researchers examined millions of transactions on Bitfinex, one of the world’s largest cryptocurrency exchanges by trading volume, using the public blockchain ledger to trace the flow of Tether tokens. Their approach was straightforward but technically rigorous: they identified every instance where Tether was issued and tracked how those newly minted tokens moved through the ecosystem. What they found was a striking pattern. After Bitcoin experienced significant price declines, large batches of Tether would be transferred to Bitfinex and used to purchase Bitcoin, creating buying pressure that arrested the decline and often reversed it. This wasn’t random market behavior — the timing was suspiciously precise. The algorithm used by the researchers performed what economists call “placebo tests” — the same analysis applied to other exchanges like Poloniex and Bittrex showed no similar pattern, suggesting the effect was specific to the Tether-Bitfinex ecosystem. Griffin, who had spent a decade building a track record of detecting financial fraud in credit markets, mortgage-backed securities, and even the VIX volatility index, described the methodology as tracking “footprints in the data” — the blockchain serving as an immutable record of potentially manipulative trading activity. The paper’s statistical framework controlled for legitimate market factors like organic demand, news events, and general market sentiment, isolating the marginal price impact attributable specifically to Tether purchases.
Real-World Applications
The study’s real-world implications extended far beyond academic circles. Bitfinex and Tether had already been under intense scrutiny. In December 2017, the Commodity Futures Trading Commission had issued subpoenas to both entities, adding regulatory weight to longstanding industry concerns. In 2016, the CFTC had fined Bitfinex $75,000 for failing to register with the agency and offering what it deemed “illegal” cryptocurrency transactions. The same year, hackers had stolen 119,756 bitcoins from the Caribbean-based exchange. Dan Ciotoli, a software engineer and blockchain analyst at Bespoke Investment Group, noted that “the lack of transparency surrounding Tether raises red flags” and that “it’s probable that Tether issuance made significant contributions to artificially high bitcoin prices seen last year.” Others had raised concerns that Tether might not actually hold sufficient U.S. dollar reserves to back its tokens in circulation — a question that would persist for years and eventually lead to a landmark settlement with the New York Attorney General’s office in 2021. Bitfinex CEO J.L. van der Velde categorically denied the allegations in a statement to CNBC: “Bitfinex nor Tether is, or has ever, engaged in any sort of market or price manipulation. Tether issuances cannot be used to prop up the price of Bitcoin or any other coin/token on Bitfinex.”
Scalability and Limitations
While Griffin and Shams’ research was statistically compelling, it faced important limitations. The study established correlation — not necessarily causation. Tether purchases following Bitcoin price dips could, in theory, represent legitimate trading activity by market participants who believed Bitcoin was undervalued during pullbacks. The paper acknowledged this possibility but argued that the consistency, timing, and magnitude of the pattern strongly suggested coordinated intervention rather than independent rational trading. Additionally, the research focused primarily on the Bitfinex exchange, and while Bitfinex was a major venue, the cryptocurrency market includes dozens of exchanges with different order flows and liquidity dynamics. Extrapolating Bitfinex-specific patterns to the entire global Bitcoin market required assumptions that not all researchers accepted. The study also couldn’t definitively identify who was behind the suspicious Tether flows — the blockchain records transactions but not the identities of their initiators. This gap meant the paper could describe what happened with considerable precision but could not assign responsibility to specific actors, leaving the most explosive questions legally unresolved.
The Future Horizon
The Griffin-Shams paper would prove to be one of the most influential pieces of cryptocurrency research ever published, spawning a cottage industry of follow-up studies, regulatory investigations, and legal proceedings. The New York Attorney General’s office launched a probe into Bitfinex and Tether that would eventually reveal the companies had commingled funds and that Tether’s reserves were not fully backed by U.S. dollars at various points — findings that lent credence to the manipulation thesis without fully confirming it. In 2021, Tether settled with the NYAG, agreeing to pay $18.5 million and submit to regular reporting of its reserves, while admitting no wrongdoing. The academic paper itself, titled “Is Bitcoin Really Untethered?”, was eventually published in the prestigious Journal of Finance in 2020, undergoing rigorous peer review that strengthened its statistical claims. For the cryptocurrency industry, the episode crystallized a fundamental tension: the same blockchain transparency that enables manipulation detection also makes markets potentially vulnerable to coordinated attacks by well-capitalized actors. The lesson for future market participants was clear — in a world of transparent ledgers, your trading patterns leave permanent footprints, and sophisticated analysis can reconstruct even the most carefully concealed market interventions from those traces alone.
Disclaimer: This article is for informational purposes only and does not constitute financial, investment, or legal advice. The research discussed represents academic findings and allegations, not proven facts or legal conclusions. Readers should conduct their own research and consult qualified professionals before making investment decisions.
87 hours of Tether trading explaining 50pct of Bitcoins bull run is still the most damning stat in crypto academic research. Griffin and Shams did real forensic work here
GriffinReader_ correlation isnt manipulation. Tether was the primary on ramp during 2017 so of course issuance correlated with price action. the causal claim is weaker than people think
87 hours of Tether printing explaining 50% of the BTC pump and 8 years later still no real audit. a cayman law firm PDF is apparently sufficient for a 100B token
Griffin matched Bitfinex wallet withdrawal timestamps to Tether mints almost to the minute. thats forensic accounting not vibes. and nobody in power did anything
64pct of the altcoin pump explained by concentrated Tether minting during low liquidity periods. you can dismiss correlation all you want but the timing windows were suspiciously precise
66 page study showed 87 hours of tether trades explaining half the 2017 btc gains. btc sat at 6252 during that report
tether manipulation claims from griffin and shams still get cited whenever btc moves fast
87 hours of tether printing explained 50% of the btc pump. griffin and shams did the math and nobody in power cared
the study was solid but tether defenders just screamed fud without addressing any of the actual data points
the tether defenders always say ‘fud’ but never address how 87 hours of concentrated printing moved the entire market. griffin and shams had receipts
the tether defenders screaming fud never had a counter argument to the actual data. griffin and shams methodology was bulletproof
87 hours of concentrated printing and 8 years later still no full audit. bitfinex has been running the biggest opaque operation in finance and somehow its fine
btc_purist 87 hours explaining 50 percent of the pump and tether defenders still cry fud. griffin and shams had blockchain receipts, not vibes
still blows my mind that bitfinex and tether never produced a real audit. a signed pdf from a law firm is not an audit
a signed pdf from a cayman islands law firm. and people wonder why the institutional crowd took so long to take crypto seriously
nonce_badger_ a signed PDF from a cayman law firm for a $100B token. tradfi compliance departments would laugh this out of the room
the study was 2018 and we still dont have a real tether audit in 2026. at this point its willful ignorance from regulators
fiat_leak 87 hours of printing explaining 50% of the pump and tether still hasnt produced a real audit. 8 years of willful ignorance
stable_watch_ 87 hours explaining 50 percent of the pump and still no audit 8 years later. at this point regulators are deliberately looking the other way
8 years and still no real audit. a cayman islands law firm letter is apparently enough for a 100 billion dollar token. wild
griffin and shams traced 87 hours of tether issuance to specific bitcoin pumps on bitfinex. thats not circumstantial, thats forensic accounting
onchain_dig_ the bitfinex connection is what made the study credible. they matched withdrawal timestamps from bitfinex wallets to tether mints almost to the minute
8 years and counting. if tether was a public company the SEC would have forced an audit years ago
Griffin and Shams matched bitfinex wallet withdrawal timestamps to tether mints almost to the minute. thats not circumstantial
Joana M. matching Bitfinex withdrawal timestamps to Tether mints almost to the minute is forensic accounting not speculation. the data was on-chain the whole time
a 66 page study showing 87 hours of concentrated Tether moves drove half the BTC pump and the response was 8 years of silence from regulators