Arbitrum

The official Arbitrum account's weekly recap highlighted Robinhood Chain crossing $100B+ in cumulative volume on Uniswap and USDG lending on Morpho reaching $143M on Arbitrum One.

• Cross River is building its tokenized lending platform on Arbitrum One, architected by Offchain's Enterprise Services team
• The recap also pointed to SBI's continued work on the network, rounding out a week focused on lending, stablecoins and institutional tokenization

The post bundles the four items in a single roundup, with the Cross River and SBI mentions tracking previously announced partnerships and the Robinhood Chain and Morpho figures marking new milestones.

Privacy protocol NullMask has arrived on Arbitrum, letting users send, deposit and check balances privately from the network, the official Arbitrum account announced. NullMask is a zero-knowledge privacy layer that works inside users' existing wallets and supports native ETH and any supported ERC-20, without new seed phrases or accounts.

The integration adds another privacy primitive to Arbitrum's programmable economy, arriving just after Fhenix brought FHE-based confidentiality to the network. No further detail on supported tokens, fees or rollout specifics was shared in the announcement.

The official Arbitrum account announced a new perpetual market on the network: Internet Meltdown, listed on Perp.city. The market lets traders bet on the security of the internet, perp.city's latest event-driven perp index.

• Perp.city is a perps venue live on Arbitrum One where users trade perpetual futures on indices built from real-time internet information, settling in USDC
• It joins previous data-driven markets such as its Strait of Hormuz vessel-traffic market, which lets users go long or short on live ship counts
• No details on settlement terms, index methodology or fees were shared in the announcement

DeriW, the perpetuals DEX incubated by CoinW, announced it is bringing more markets onchain, with its own Layer 3 running every trade and settling to Arbitrum. The platform cites zero gas fees, zero-slippage BTC/ETH execution under supported conditions, and perpetual markets across crypto and traditional assets. The official Arbitrum account retweeted the announcement, framing it as part of the network's growing derivatives ecosystem.

DeriW runs on Arbitrum Orbit as a Layer 3 chain, positioning itself as a high-throughput, low-cost derivatives venue that settles to Arbitrum One. No specific new markets or a launch timeline were detailed in the announcement.

Mercuryo Swaps now supports bridging funds into Arbitrum from 20 other networks, the official Arbitrum account announced via a retweet of Mercuryo's message. The integration adds another on-ramp into the Arbitrum ecosystem, alongside wallet and exchange integrations the network has been promoting.

No further detail on supported assets, routes or fees was shared in the announcement.

The official Arbitrum account has kept up a running explanation of why Robinhood chose Arbitrum to power Robinhood Chain. In reply to Robinhood CEO Vlad Tenev — who said the firm "looked long and hard at all the other ecosystems" and found "nothing quite met our specific needs of building the #1 chain for real world assets (and memes too)" — Arbitrum answered: "Nothing - but Arbitrum @RobinhoodApp deserved their own chain, and we're happy to have worked with them to make it happen."

• Tenev's remarks came in response to questions about why Robinhood picked Arbitrum over other ecosystems
• Arbitrum's own framing cites a strong fit between the teams, a proven track record building and scaling blockchain infrastructure, and a faster path to launch that let Robinhood focus on the financial products built on top

Arbitrum has opened applications for the Arbitrum Stablecoin Growth Program, a Arbitrum Foundation incentive initiative for apps building with USDG at their core. Teams with $1M+ in stablecoin balances that bring USDG into lending, yield, AMM, or payments apps on Arbitrum as the primary stablecoin, collateral or on-ramp asset can apply for comarketing, technical integrations and foundation advisory, direct consideration for allocations under Arbitrum's 165M ARB incentive programs, 200,000 ARB each for the first 10 teams reaching a $10M USDG TVL average, TVL-based rewards, and a share of a 2M ARB prize pool.

• Early-stage teams deploying innovative vaults, AMMs or lending rails are actively reviewed for onboarding even without legacy volume, whether on Arbitrum One or another chain
• Arbitrum cited GMX as the model: its USDG supply surged from ~$1.5M in early October to nearly $17M — roughly 10x in under a month — after integrating USDG into its GM pools

The program anchors Arbitrum's wider push to grow adoption of USDG, the Paxos-issued dollar stablecoin on Arbitrum One.

Arbitrum and Robinhood Chain's Founder House Singapore, which ran October 23rd–25th with 125+ founders and 76 projects, has named the teams taking home a share of the $300K prize pool. The in-person program featured talks and mentorship from Offchain Labs, Pendle, QuickNode, Paxos, SBI Digital Markets and GMX, with HackQuest as partner and Trail of Bits sponsoring across the Buildathon and Founder House.

Winners announced in November include:

• General Track 1st place ($60K): Atoma — a market-neutral RWA yield layer for tokenized stock perps on Arbitrum
• Robinhood Chain Track Founder-in-Residence Award ($60K): Hyperloop — a non-liquidative lending protocol
• Promising Products Track 1st place ($10K): Stockripx — an onchain product with early traction
• Earlier-stage standouts to watch include Zona

Arbitrum later spotlighted the winners in a video with Atoma, Stockripx, KurtosisLabs, Chainwall, Hyperloop and Tawf Foundation sharing how Founder House supported them in bringing their products to the Arbitrum Platform. Support continues via the Arbitrum Mentorship Program with Robinhood Chain, offering mentorship to help winning teams scale.

The dollar stablecoin USDG, issued by Paxos and regulated in Singapore and the EU, keeps expanding across Arbitrum One. Orderly Network announced that all 500+ Orderly-powered DEXs now accept USDG as collateral on Arbitrum, letting traders use the stablecoin directly as margin for perps without swapping to USDC first.

• Orderly joins AI-driven yield agent ZyFAI, cross-chain bridges Mayan and Symbiosis, and lending protocol Dolomite in the wave of USDG integrations on Arbitrum
• Existing integrations include Fluid, Morpho, GMX, Maple, Uniswap and Kraken; Stargate (LayerZero) and LI.FI handle bridging and on-ramps
• The rollout arrives with $10M+ in incentives through the DRIP program and a proposal before the ArbitrumDAO to commit 100M ARB plus treasury assets to USDG growth
• USDG has $3B+ in circulation across networks, while about $4B in stablecoins sit on Arbitrum

What The Hook (@whatthehookv4) — a protocol built on Uniswap v4 hooks that recaptures value lost to cross-pool arbitrage — has announced full support for Arbitrum, letting the entire Arbitrum ecosystem use arbitrage recapture "as a new layer for the Programmable Economy."

The official Arbitrum account retweeted the announcement. What The Hook says the coverage extends from launchpads and individual LP providers to aggregators and AMMs, turning arbitrage leakage into a revenue stream for liquidity providers. No further detail on deployment specifics or supported pools was shared.