Stock Exchange
$4.57Sp base cost · $4.85Qa/sec
Business Overview
Where fortunes trade hands.
Every tycoon's portfolio eventually includes a Stock Exchange — reliable, scalable, and easy to reason about.
Cost Scaling
Every business in Tycoon Cards uses the same cost curve: each copy costs 15% more than the last. For the Stock Exchange, that looks like this:
| Copies owned | Cost of next copy | Total spent to reach this many |
|---|---|---|
| 1 | $5.25Sp | $4.57Sp |
| 10 | $18.5Sp | $92.7Sp |
| 25 | $150Sp | $972Sp |
| 50 | $4.95Oc | $33.0Oc |
| 100 | $5.36No | $35.8No |
Income Scaling
Income scales linearly with copies owned — no diminishing returns, ever. Owning more of the Stock Exchange always earns proportionally more:
| Copies owned | Income per second |
|---|---|
| 1 | $4.85Qa/s |
| 10 | $48.5Qa/s |
| 25 | $121Qa/s |
| 50 | $242Qa/s |
| 100 | $485Qa/s |
Profit Calculations
| Payback period (1st copy) | 942,532,054 seconds |
| Income per dollar spent | $0.0/s per $1 |
| Efficient switch point | Around copy #4 (when the next copy costs more than Cryptocurrency Exchange) |
See the Business Tier List for how this business ranks against all other 99 tiers by payback period.
Unlock Requirements
There is no gating system on businesses in Tycoon Cards — the Stock Exchange is available to purchase from the very start of any run, the moment you can afford its $4.57Sp base cost. The only realistic "requirement" is reaching that amount of money, either by clicking, by owning cheaper businesses, or by carrying prestige and card bonuses from a previous run.
Best Upgrades
Individual businesses don't have their own upgrade trees in Tycoon Cards — the Stock Exchange always earns exactly $4.85Qa per copy at base rate. What actually "upgrades" its value are the game's shared systems: levelling supporting cards (below), earning achievement bonuses, and increasing your prestige multiplier. Each of these applies as a percentage on top of every business you own, including this one.
Best Supporting Cards
At this tier, all-income and passive-income cards deliver the biggest absolute gains, since a percentage bonus on a high-earning business is worth far more in raw dollars than the same percentage on a cheap early tier.
Prestige Recommendations
Reaching this tier is typically a late-run or veteran-account milestone. If you're here, you're likely earning enough lifetime income to justify a prestige reset for a meaningful batch of prestige points.
Read the full Prestige Guide for general reset timing, or the Prestige Point Planning guide to calculate exactly how many points your next reset will earn.
Research Interactions
Tycoon Cards does not currently include a research-tree system — the Stock Exchange cannot be researched or unlocked through any mechanic beyond simply affording it. A research tree is listed as a possible future system on our Updates & Roadmap page; this section will be updated if that ever changes.
Evolution Path (Tier Progression)
Businesses in Tycoon Cards don't evolve or transform — each tier is a permanent, independent business. What we can show honestly is this business's place in the overall 100-tier progression:
- Previous tier: 💰 Venture Capital Firm ($2.95Sp base cost)
- This tier: 📈 Stock Exchange ($4.57Sp base cost)
- Next tier: 🪙 Cryptocurrency Exchange ($7.08Sp base cost)
Visual Progression
The five tiers surrounding the Stock Exchange in the business roster:
Best Strategies
- Reserved for veteran accounts with substantial prestige multipliers — the cost only makes sense once your income bonuses are well developed.
- Treat owning this tier as a long-term goal for a run rather than something to rush toward immediately after a prestige reset.
- Remember that all businesses share the same 15%-per-copy cost curve, so the fundamental buy/hold maths never changes — only the absolute numbers do.
Frequently Asked Questions
How much does the Stock Exchange cost?
+
How much does the Stock Exchange cost?
+The first copy costs 4,567,500,523,164,308,700,000,000 in-game dollars. Each subsequent copy costs 15% more than the last, following the same cost curve used by every business in Tycoon Cards.
How much does the Stock Exchange earn?
+
How much does the Stock Exchange earn?
+Each copy of the Stock Exchange earns 4,845,989,590,852,613 per second, before any card, achievement, or prestige bonuses are applied.
How long does it take for the Stock Exchange to pay for itself?
+
How long does it take for the Stock Exchange to pay for itself?
+At base rates, one copy pays back its own cost in approximately 942,532,054 seconds — though bonuses from cards and prestige typically shorten this in practice.
When should I switch from the Stock Exchange to Cryptocurrency Exchange?
+
When should I switch from the Stock Exchange to Cryptocurrency Exchange?
+Once you own around 4 copies of the Stock Exchange, the cost of your next copy will exceed Cryptocurrency Exchange's base price — a reasonable signal to start diversifying into that tier instead.
Does prestige reset my Stock Exchange count?
+
Does prestige reset my Stock Exchange count?
+Yes. Prestiging resets all business ownership, including the Stock Exchange, back to zero. However, any cards or achievements that boost this business's income remain permanently in effect on your next run.
Related Businesses
Related Guides
- Business Guide — full roster, cost curves and buy order
- Business Tier List — every business ranked by return on investment
- Economy Guide — how growth curves and inflation work game-wide
- Prestige Guide — when and how to reset for permanent bonuses
Changelog
- v1.2.0 (April 2026) — Added as part of the business expansion from 10 to 100 tiers.
Business data verified against the live game configuration · Part of the 100-business encyclopedia · Written by the Tycoon Cards development team