When Apple announced the iPhone 15 on September 12, 2023, every iPhone 14 on the market lost value overnight.
Not because iPhone 14s changed. Not because they stopped working. The phone didn't change at all.
The market changed.
An iPhone 14 Pro trading at $680 on September 11 dropped to $595-610 by September 13. That's an $85 drop in two days. Not gradual. Not slow. Overnight.
This isn't random. It's predictable. It happens every time. Understanding the window is worth real money to sellers.
The Announcement Effect (Why It Happens)
An announcement does one thing: it shifts buyer psychology.
Before announcement: the current model is the best available. If you want the latest, you buy now. Supply is adequate. Demand is stable. Price is stable.
Announcement arrives: a better model is coming soon. Buyers delay. Current model demand drops sharply. Supply of older stock increases (people offload before value drops further). Price drops immediately.
The effect is simple economics. Demand down, supply up, price down.
But the timing matters. The window matters. The recovery matters.
How Much Value Is Lost (Real Numbers)
Different devices see different announcement effects. Flagships see steeper drops than mid-range. Premium brands see different effects than budget brands.
iPhone Announcement Effects (Historical):
iPhone 14 Pro, pre-announcement value: $680
- September 11 (day before): $680 (peak)
- September 12 (announcement): $650 (4% drop, mid-announcement)
- September 13 (day after): $595-610 (12% drop total)
- September 20 (one week after): $580-595 (13% drop, stable)
- October 1 (two weeks after): $590-605 (12% drop, slight recovery)
- October 15 (one month after): $610-625 (8% drop, recovery ongoing)
- November 1 (six weeks after): $640-655 (4% drop, near recovery)
Total value lost: $25-85 depending on when you sell. Average: $50-60.
Samsung Galaxy Announcement Effects (Historical):
Galaxy S24, pre-announcement value: $580
- January 29 (day before): $580 (peak)
- January 30 (announcement): $560 (3% drop)
- January 31 (day after): $520-535 (8-10% drop total)
- February 7 (one week after): $510-520 (10% drop)
- February 21 (three weeks after): $530-545 (7% drop, recovery starting)
- March 1 (one month after): $550-560 (3% drop, recovery)
Total value lost: $20-70. Average: $40-50.
The Pattern: Announcements create an 8-12% value cliff. Recovery takes 4-6 weeks. The announcement window is worth $40-85 per device depending on original value.
For someone selling multiple devices, this adds up. Ten phones, fifty-dollar loss per phone: five hundred dollars left on the table by selling at the wrong time.
The Timing Window Breakdown (When Exactly?)
The announcement effect follows a predictable timeline.
Phase 1: Pre-Announcement (Weeks -2 to 0)
Timeline: Two weeks before announcement to announcement day
Value: Peak. This is the highest price the old model will ever see.
Buyer psychology: "If I want the latest now, I need to buy before the new model ships. Better buy now."
Seller action: If you're going to sell, this is the window. Peak value exists here.
Real numbers: iPhone 14 Pro at $680. This is the price for exactly 2 weeks.
Phase 2: Announcement Shock (Day 0 to Day 3)
Timeline: Announcement day through 72 hours after
Value: Steep drop. 8-12% loss in 72 hours.
Buyer psychology: "Wait, a new model is coming. Why would I buy the old model? I'll wait for details on the new one."
Seller action: Avoid this window entirely. Value is in free fall. Selling here is a mistake.
Real numbers: iPhone drops from $680 to $610 in three days. Selling on day 1 captures only 90% of peak value.
Phase 3: Post-Announcement Trough (Day 4 to Day 28)
Timeline: Three days after announcement through four weeks after
Value: Lowest. Most people who wanted the new model have clarity on it. Few buyers remain for the old model.
Buyer psychology: "The new model is coming. Why buy the old one? I'll either wait or accept a used old model at discount."
Seller action: Still avoid. Value is bottoming. No recovery yet.
Real numbers: iPhone 14 Pro holds around $595-610 for three weeks. No upside.
Phase 4: Recovery Window (Day 29 to Day 45)
Timeline: Four weeks after announcement through six weeks after
Value: Recovering. Early adopters of the new model acquired it. Used market for the old model re-emerges. Buyers return.
Buyer psychology: "The new model is available. I'm not buying it. But the old model is available used and discounted. This is a good deal."
Seller action: Selling becomes viable again. Value recovery is happening. Price is improving weekly.
Real numbers: iPhone 14 Pro rises from $595-610 to $625-640 over two weeks. Upside exists.
Phase 5: Stabilization (Day 46+)
Timeline: Six weeks after announcement onward
Value: Stabilized at new baseline. The old model is now "last generation." Value holds steady.
Buyer psychology: "The new model is standard. The old model is used/last-gen. Here's what I'll pay for it."
Seller action: Value is stable. No urgency to sell now. No premium to waiting. Neutral timing.
Real numbers: iPhone 14 Pro settles at $640-655 for months. Stable price.
Why This Happens (The Psychology Behind It)
Announcements create information asymmetry. Before announcement, the future is uncertain. After announcement, the future is clear.
Uncertainty creates demand. When the future is fuzzy, buyers settle for current-generation. Current-generation is the best known option.
Clarity creates patience. When the future is known, buyers wait. They know what's coming. They can make informed decisions.
That shift from uncertainty to clarity drives the announcement effect. It's not about technology. It's about information.
A month after announcement, information is fully priced in. Buyers who want the new model have it or know they're waiting. Buyers who don't have the new model are comfortable with the old model at the new (lower) price. Value stabilizes.
How to Use This Information (Practical Application)
If you own a phone or similar device that's likely to face an announcement, use this window.
Rule 1: Sell before announcements.
If your device is within 3-4 months of an announced refresh, sell now. Peak value exists now. Waiting costs money.
Example: It's now June. iPhone 16 will be announced in September (predictable). If you own an iPhone 15, sell this month or July. Wait until September and you'll get 12% less.
Rule 2: Don't sell the week of announcement.
Even if you didn't get out before the announcement, don't panic-sell during the announcement week. The value cliff exists and stabilizes. Waiting 4-5 weeks captures recovery.
Example: You meant to sell your iPhone 15 before announcement. Too late. Don't sell on announcement week. Wait until early October (4+ weeks after). Value will be 90% recovered.
Rule 3: Buy after announcements.
If you're buying, wait for the announcement effect. Announcement creates supply (people upgrading, offloading old models). Announcement creates demand suppression (buyers waiting for new model). The intersection creates discount.
Example: You want an iPhone 14. Wait for iPhone 15 announcement. Price drops 12%. You save $80-100 by waiting.
Rule 4: Understand your category's announcement cycle.
Not all categories have announcement cycles. Furniture doesn't. Vintage watches don't. But phones, laptops, cars do. Understanding your category matters.
Beyond Tech (Other Categories With Announcement Effects)
Tech isn't the only category with announcements.
Cars: New model years are announced. Old model year prices drop when new models arrive. Worth thousands on vehicles.
Fashion: New collections launch. Previous season discounts. Worth understanding if buying/selling designer pieces.
Gaming: New consoles announced. Previous generation prices drop. Worth tracking if you buy/sell gaming hardware.
Watches: Luxury brands announce new collections. Previous collections discount. Worth attention for expensive watches.
The mechanism is the same everywhere. Information clarity shifts demand. Demand shift creates timing windows.
What Comes Next
Day 7 covered Factor 3 (Market Timing), specifically announcement effects.
Days 8-9 will cover the other two factors: condition trajectory and lifecycle stage. How they work. How they interact.
Day 10 will show how all three work together to predict actual value.
→ Read Day 8: Condition Trajectories (How Different Categories Decay)