The 100-Friend Meta: Social List Arbitrage | Endfield Blog | Arknights: Endfield Blog

In Arknights: Endfield, your factory in the Automated Industry Center (AIC) is the engine, but Friend Arbitrage is the nitro boost that generates millions of Stock Bills. Because market prices are unique to every player’s instance, a commodity that is dirt cheap in your world can often be sold for a massive markup in a friend’s base. This isn’t just a side activity—it is a sophisticated trading simulation where the goal is to “Buy Low” locally and “Sell High” globally.

Why 100 Friends? The Statistical Power of Random Adds

The game allows for a maximum of 100 friends, and the community “meta” is to fill every single slot with active players. You don’t need to coordinate or even speak with them; you simply need access to their market data. By maxing your list, you statistically maximize your probability of finding at least one “High Peak” sell price (often 500%+) every day.

How to Build Your List

Head to the Reddit Friend Request Megathread to find UIDs for your specific region (Asia, NA, or EU). Players are encouraged to “spam add” randoms, as everyone needs active traders to keep the economy moving.

Maintenance Tip

Regularly sort your list by “last active” and prune anyone inactive for more than 48 hours to ensure your “price feed” stays fresh. A dead friend slot is a lost profit opportunity.

The Arbitrage Workflow

Executing a successful arbitrage run follows a simple four-step loop. Master this routine and you can complete it in under 10 minutes per day.

Step 1: Identify the “Buy Low” Window

Check your local Stock Redistribution terminal (accessed via Lucky Carrot in regional hubs or your Dijiang ship). Look for red downward arrows indicating discounts of 20-40% or items priced below 1,000 bills.

Key Threshold: Anything below 800 Stock Bills is a strong buy candidate for Elastic Goods.

Step 2: Use the “Friend’s Price” Button

Select a discounted item and click the “Friend’s Price” button. This in-game tool shows the current sell rates for everyone on your list. The interface displays green percentage markers for profitable opportunities.

Step 3: The Transaction

Visit the friend with the highest green percentage. Once you spawn on their ship, the trading terminal is typically located to the left of the spawn point. Interact and sell your entire stack.

Step 4: Respect Quantity Limits

You are limited by your terminal’s daily purchase cap (starting at 30 units). Upgrade your terminal to Level 2 early to unlock Elastic Goods and increase these limits. Level 4 terminals offer the highest caps for serious traders.

Know Your Price Tiers

Not all goods are created equal. Community data mining has identified three distinct peak ceilings. If you hold a “Low Peak” item hoping for a 5,000+ price, you will be waiting forever.

Peak Tier	Upper Ceiling (Bills/Unit)	Sample Commodities
Low Peak	~4,700	Aggeloi War Tins, Wuxia Movies, Musbeast Dangles
Mid Peak	~5,000	Astarron Crystals, Unity Syrup, Unity Fillets
High Peak	~5,400+	Hard Noggin Helmets, Scrap Toy Blocks, Originium Saplings

Strategic Insight: High Peak items are the most volatile but offer the highest ceiling. Prioritize these when your local market crashes below 600 bills.

The Weekly Market Cycle

The Talos-II economy follows a predictable temporal rhythm. Understanding this cycle separates casual traders from millionaires.

Purchase Windows (Tuesday–Thursday)

Purchase prices tend to hit their lowest points early in the week. This is your accumulation phase—buy aggressively when you see -60% or better discounts.

Liquidation Windows (Friday–Monday)

Sell prices typically surge as the market approaches the Monday reset (04:00 UTC+8). Strategy dictates accumulating stock during the week and liquidating everything in a massive weekend dump.

Reset Warning: All daily limits and friend prices reset at 04:00 UTC+8. Plan your final sell run before the clock hits zero.

Essential Trading Tools

To ensure you are making a profit and not just moving numbers, use community-developed calculators:

calc.endfield.tools

A web-based tool that calculates net profit per unit by comparing your local buy price against multiple friend sell prices. Input your buy price and the target sell price to see exact returns before committing inventory.

The Profit Formula

Veteran traders focus on profit per unit rather than percentage:

P_net = (V_sell - V_buy) × Q

Where:

P_net = Net profit in Stock Bills
V_sell = Sell price per unit
V_buy = Buy price per unit
Q = Quantity sold

Example: Buying at 500 bills and selling 30 units at 5,000 bills yields: (5,000 - 500) × 30 = 135,000 Stock Bills per arbitrage run

When you visit a friend’s ship to make millions, it is common etiquette to use your daily Production Assists. You can support up to 5 friend rooms per day, which grants you Ship Credits and provides your host with a production boost—a perfect “thank you” for their favorable market rates.

How to Leave a Tip

Visit the friend whose terminal you used
Navigate to any production room (Mining, Processing, MFG)
Click Support to boost their production with your operator
Your host receives bonus output; you earn Ship Credits

This reciprocal system keeps the friend economy healthy. Active traders with full assistance logs are more likely to be kept on friends lists long-term.

The Million-Bill Daily Loop

Here is the complete daily routine for maximizing Friend Arbitrage income:

04:00 UTC+8 Reset: Check local Elastic Goods for deep discounts (-60% or better)
Buy Phase: Purchase maximum daily limits on all crashed items
Scout Phase: Use Friend’s Price button to identify 400%+ markup opportunities
Sell Phase: Visit top 3-5 friends with best prices, dump entire inventory
Karma Phase: Leave Production Assists in 5 friend rooms
Prune Phase: Remove inactive friends (48+ hours), add new active traders from Reddit

Expected Income: With a full 100-friend list and disciplined execution, daily profits range from 800,000 to 1,500,000 Stock Bills depending on market variance.

Final Checklist

Friend List: Filled to 100 with active traders (Reddit megathread)
Terminal Upgrades: Stock Redistribution terminal at Level 4 for max caps
Buy Discipline: Only purchase at -60% discount or better
Sell Discipline: Only sell at 400%+ markup to friends
Weekly Rhythm: Accumulate Tue-Thu, liquidate Fri-Mon
Social Etiquette: Leave 5 Production Assists daily

Your social list is your biggest wallet on Talos-II. Treat it like a portfolio, prune it like a garden, and watch your Stock Bill reserves explode.