Simulating the Shanghai Upgrade: Analyzing Ethereum Unlock Dynamics

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The highly anticipated Shanghai/Capella hard fork, implemented on April 12, 2023, marked a pivotal moment in Ethereum’s evolution. For the first time since the Beacon Chain launched in December 2020, stakers gained the ability to withdraw their staked ETH and accumulated rewards. With approximately 18 million ETH (about 15% of the total circulating supply) suddenly becoming unlockable, market participants widely speculated about potential sell pressure and price volatility.

This analysis dives deep into Ethereum’s staking ecosystem to assess who is most likely to withdraw, how much ETH might enter circulation, and what real-world impact these outflows could have. By segmenting stakers based on behavior, profitability, size, and timing, we provide a data-driven framework to separate fear from fact.


Understanding Ethereum’s Proof-of-Stake Structure

To accurately model post-Shanghai dynamics, it's essential to understand the key actors in Ethereum’s consensus layer:

While much research focuses on validators as primary economic agents, decisions are ultimately made at the depositor level—real people or organizations deciding whether to withdraw, reinvest, or sell.

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Classifying Stakers: A Behavioral Framework

We segment depositors using four core dimensions:

  1. Age: How long they’ve been active since initial deposit.
  2. Size: Number of validators controlled (from solo stakers to whales).
  3. Profitability: Unrealized profit/loss based on entry price vs current ETH value.
  4. Type: Individual (self-staking) vs institutional providers (e.g., Lido, Coinbase).

This classification helps predict withdrawal motivations and potential market impact.

Individual vs Institutional Stakers

Analyzing deposit patterns reveals two distinct groups:

Notably, recurring staking activity remained subdued during the 2021 bull run but surged after The Merge, reflecting growing confidence in Ethereum’s long-term vision.

The Rise of Staking Providers

Staking providers enable users to participate without running nodes or committing 32 ETH. Key players include:

However, regulatory scrutiny has impacted centralized providers. Kraken exited U.S. staking services in February 2023 after an SEC fine, while Coinbase received a Wells Notice in March—slowing institutional momentum.


Depositor Age and Commitment Levels

We categorize depositors by when they first participated:

Early adopters likely view staking not just as an investment but as a form of network stewardship. Their low exit likelihood supports network stability.


Depositor Size Distribution

After excluding providers, we observe a bimodal distribution:

Notably, mid-sized operators ("crabs" and "fish") make up only 13.5% of depositors—highlighting centralization trends.

Whales dominate unrealized losses (76% of $4.7B total), yet their financial resilience reduces immediate sell motivation.


Profitability and Unrealized Gains/Losses

The average entry price for all staked ETH is **$2,136**, resulting in a **-13% unrealized loss** at current prices (~$1,870). In contrast, Ethereum’s overall realized price is $1,403—meaning the broader holder base is up +36%.

Key insights by provider:

High-cost depositors may be more inclined to exit—but liquid staking derivatives like stETH allow hedging without withdrawal.

Approximately half of all staked ETH is underwater, influencing behavioral incentives post-unlock.


Simulating Partial Withdrawals: Claiming Accumulated Rewards

Post-Shanghai, two withdrawal types became possible:

Currently, ~1.137 million ETH (~$2.1B) sits as unclaimed rewards across validators.

Only validators with updated 0x01 withdrawal credentials qualify for automatic processing. Presently, only 44% meet this requirement.

Crucially:

Estimated Reward Unlock Scenarios

ScenarioETH ReleasedTimeframe
Conservative (50% credential update)~706,000 ETH ($1.31B)Over several days
Maximum (all update immediately)1.137M ETH ($2.1B)Within 4.5 days

We estimate 70.6K–162K ETH ($141M–$303M) could be sold immediately—driven largely by smaller or financially constrained actors.

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Simulating Full Withdrawals: Exiting the Staking Pool

Daily withdrawal capacity is limited by Ethereum’s churn limit:

Churn Limit = Active Validators / 65,536
→ Currently allows ~1,800 validators per day (~57,600 ETH).

Additional delays apply:

As of pre-Shanghai data:

Only 253 unique depositors are involved—mostly solo stakers from early bull market phases.

While Coinbase plans immediate withdrawals, Lido delays until May; Kraken and Binance have not announced timelines.

Even under extreme demand, no more than 57,600 ETH/day becomes liquid—less than daily issuance (~13,500 ETH/day).


Total Supply Impact: Three Realistic Scenarios

ScenarioDescriptionTotal ETH SoldMarket Context
ExtremeAll rewards + max daily exits sold1.54M ETH ($2.93B)Doubles weekly exchange inflows
BaselineOnly 0x01 credential holders claim; moderate exits312K ETH ($592M)Within normal volatility range
Most Likely50% credential updates; reinvestment trends; doubled exit queue170K ETH ($323M)Comparable to minor market events

Even the worst-case scenario falls within typical weekly exchange inflows—far below shocks like the FTX collapse.


Frequently Asked Questions (FAQ)

Q: Will the Shanghai upgrade cause a massive price drop due to selling?

A: Unlikely. Withdrawal mechanics are rate-limited (~57.6K ETH/day), and most large stakers show strong conviction. Historical exchange inflows suggest even worst-case outflows are manageable.

Q: Who is most likely to sell their withdrawn ETH?

A: Smaller stakers with urgent liquidity needs or those operating outdated setups may sell. However, whales and institutions are more likely to reinvest or hold.

Q: Can all staked ETH be withdrawn immediately?

A: No. Only excess rewards above 32 ETH per validator can be skimmed instantly—if credentials are updated. Full principal withdrawals are capped at ~57,600 ETH per day.

Q: Are staking providers selling their holdings?

A: Most are not. Lido plans delayed withdrawals; Coinbase allows them but likely won’t dump. Regulatory pressure has slowed centralized exits.

Q: How does profitability affect withdrawal decisions?

A: Many stakers are underwater (~50% of supply), reducing incentive to sell at a loss. High-cost entrants may prefer holding for recovery or using derivatives for liquidity.

Q: Is the network secure if many validators exit?

A: Yes. The churn limit ensures gradual exits over weeks or months—even under peak demand—preserving consensus stability.


Final Outlook: Minimal Market Impact Expected

Despite widespread fears, our analysis concludes that post-Shanghai sell pressure will be modest and well-contained:

The real story isn’t risk—it’s maturation. Shanghai unlocks new utility for staked assets, empowering DeFi innovation and long-term participation.

Ethereum’s design shines under pressure: predictable, resilient, and aligned with decentralized principles.

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