ELASTIC GOODS TRADING TIERS: PROFIT MAXIMIZATION
Stop holding 4.7k goods for a 5k price that will never arrive. If you’ve been trading elastic goods in Arknights: Endfield without understanding price tiers, you’re leaving millions of Stock Bills on the table every week.
After launch week, either through intentional developer adjustments or hidden stock trading mechanics, elastic goods prices were lowered and stabilized to current levels. Understanding these patterns is the difference between profitable trading and wasted inventory space.
Here’s the complete breakdown of elastic goods tiers, weekly price cycles, and optimal trading windows.
TL;DR - Key Points
- Three sell price tiers exist — Low Peak (~4.7k), Mid Peak (~5.0k), High Peak (~5.4k); don’t hold low-tier goods expecting mid-tier prices
- Weekly price cycles — Prices rise toward weekend (sell Fri-Sun), fall early week (buy Mon-Wed)
- Buy even at -1000 discount — RNG isn’t reliable enough to guarantee expected low prices; secure volume over perfection
- 16 elastic goods total — Split into three tiers based on unlock order and price ceilings
- Goods accumulate daily — Max cap on accumulation makes purchasing at reasonable prices critical
Understanding the Two Scales
Elastic goods trading operates on two primary scales: Trade Day Tiers (when to trade) and Goods Price Tiers (what to trade). Master both, and you’ll consistently achieve 900%+ profit margins.
Trade Day Tiers: The Weekly Cycle
The day of the week dramatically impacts both price ceilings and floors. This isn’t random—it’s a predictable pattern.
Price Upper Bounds Rise Through the Week
As the week progresses, the maximum sell price of elastic goods increases. Monday and Tuesday typically show the lowest ceilings, while Friday through Sunday see the highest demand spikes.
Price Lower Bounds Fall Through the Week
Conversely, the minimum buy price tends to decrease as the week advances. Early week often presents the best buying opportunities.
Optimal Trading Window
| Day Range | Action | Reasoning |
|---|---|---|
| Monday-Wednesday | Buy only (if reaching cap) | Lower prices, poor sell windows |
| Thursday | Transition day | Prices begin climbing |
| Friday-Sunday | Sell aggressively | Peak prices, best profit margins |
Key Takeaway: Avoid selling stocks early in the week. You will not get better deals until the next weekend cycle.
Goods Price Tiers: Know Your Ceiling
Not all elastic goods are created equal. Certain items have observable price ceilings at 4.7k, 5.0k, and 5.4k Stock Bills. These tiers align with the order in which goods were unlocked in-game.
Low Peak Tier (~4.7k Maximum)
These 8 goods represent the first wave of elastic goods unlocked. They consistently cap around 4,700 Stock Bills.
- Ankhorilling Kitchenware
- Musbeast Scrimshaw Dangles
- Witchcraft Mining Drill
- Aggeloi War Tins
- Wuxia Movies (Wuling)
- Eureka Anti-Smog Tincture (Wuling)
- Wuling Frozen Pears (Wuling)
- Nymphsprout (Wuling)
Critical Warning: If you’re holding these goods expecting a 5k+ sell price, you will be waiting indefinitely. Sell at 4.5k-4.7k.
Mid Peak Tier (~5.0k Maximum)
The second wave of 5 goods reaches approximately 5,000 Stock Bills at peak demand.
- Valley Hydroculture Fillets
- Unity Syrup
- Ses’qamam Knucklebones
- Astarron Crystals
- Chubby Lung Tianshi (Wuling)
High Peak Tier (~5.4k Maximum)
The final 4 goods represent the highest value elastic goods, capable of reaching 5,400+ Stock Bills.
- Originium Saplings
- Vigilant Pickaxes
- Hard Noggin Helmets
- Scrap Toy Blocks
Buy Price Floors: When to Purchase
While sell prices vary widely, buy price floors are more tightly clustered. Understanding these prevents overpaying during accumulation phases.
High Floor Goods (550+ Stock Bills)
These goods rarely drop below 550 Stock Bills, making them expensive to accumulate:
- Ankhorilling Kitchenware
- Musbeast Scrimshaw Dangles
- Witchcraft Mining Drill
- Aggeloi War Tins
- Wuxia Movies (Wuling)
- Eureka Anti-Smog Tincture (Wuling)
- Wuling Frozen Pears (Wuling)
- Nymphsprout (Wuling)
Medium Floor Goods (450+ Stock Bills)
Mid-tier goods with moderate buy prices:
- Valley Hydroculture Fillets
- Unity Syrup
- Ses’qamam Knucklebones
- Astarron Crystals
- Chubby Lung Tianshi (Wuling)
Low Floor Goods (350+ Stock Bills)
The cheapest goods to accumulate, offering the highest potential profit margins:
- Originium Saplings
- Vigilant Pickaxes
- Hard Noggin Helmets
- Scrap Toy Blocks
The Accumulation Problem
Unlike sell prices where RNG can occasionally gift you maximum values, buy prices have hard limitations due to daily accumulation caps. You cannot simply wait for the “perfect” -80% discount.
Strategic Reality: Purchasing goods at -1000 discount (or even higher) is often correct. The mathematical certainty of securing volume outweighs the gamble of waiting for deeper discounts that may never materialize before the weekly cycle resets.
Optimal Daily Trading Loop
Monday-Wednesday: Accumulation Phase
- Check your local elastic goods prices at daily reset
- Purchase maximum daily limits on goods priced at reasonable discounts
- Prioritize low floor goods (350+) when available
- Do NOT sell unless reaching inventory cap
Thursday: Assessment Day
- Evaluate your inventory composition
- Check friend terminals for emerging price spikes
- Begin positioning high-tier goods for weekend dumps
Friday-Sunday: Distribution Phase
- Sell maximum quantities to friend terminals showing +150-200% demand
- Match goods to their appropriate tier ceilings (don’t expect 5k from 4.7k goods)
- Liquidate before Monday reset
- Re-accumulate crashed goods for next cycle
Friend Network Optimization
Your profit ceiling directly correlates with your friends list size. The arbitrage system relies on statistical variance across player markets.
Minimum Network Size: 20+ active traders Optimal Network Size: 50+ active traders Daily Check Routine: Scroll entire friends list for price spikes on held goods
Pro Tip: Keep 20% of Stock Bills in liquid reserve. Market crashes can happen any day, and you need capital to buy the dip.
Common Trading Mistakes
Mistake 1: Holding Low-Tier Goods for Mid-Tier Prices
Ankhorilling Kitchenware will never sell for 5k. It’s a 4.7k good. Accept the tier, sell at the ceiling.
Mistake 2: Selling Early in the Week
Monday and Tuesday prices are systematically lower. Unless inventory-capped, hold through Friday.
Mistake 3: Waiting for Perfect Buy Prices
A -75% discount today is worth more than a hypothetical -85% discount that may never arrive before cycle reset.
Mistake 4: Ignoring Wuling Goods
The 5 Wuling-exclusive elastic goods follow identical tier mechanics. Don’t sleep on Nymphsprout or Wuling Frozen Pears.
Profit Mathematics Example
Scenario: You accumulate Vigilant Pickaxes (High Peak tier) on Monday at 400 Stock Bills each (daily max limit: 50 units).
Friday Sell Price: Friend terminal shows +250% demand at 5,400 Stock Bills.
Calculation:
- Total Investment: 50 × 400 = 20,000 Stock Bills
- Total Revenue: 50 × 5,400 = 270,000 Stock Bills
- Net Profit: 250,000 Stock Bills (1,250% ROI)
Multiply this across all 16 elastic goods with proper tier management, and weekly profits easily exceed 1.5-2 million Stock Bills.
Regional Considerations
Remember that Stock Redistribution mechanics may vary slightly between server regions (NA/EU vs Asia). The core tier structure remains consistent, but specific price floors and weekly volatility can differ.
Always validate these patterns against your own server’s market behavior for the first 2-3 weeks before committing to full-scale arbitrage operations.
Final Thoughts
Elastic goods trading is the most efficient non-combat method for generating Stock Bills in Endfield. By respecting price tiers, leveraging weekly cycles, and maintaining a robust friends network, you can fund every blueprint upgrade, operator promotion, and factory expansion without grinding a single dungeon.
Stop gambling on RNG. Start trading with data.
Special thanks to Discord user tinybabybread for the initial data compilation and to u/International_Map812 for the comprehensive Reddit analysis that formed the foundation of this guide.