IPO or direct listing debut
📈 MarketShares begin trading publicly for the first time.
Typical size
0-100% on day one
Timeframe
Day one; drift for months after
Evidence
0 logged events
Why it moves the price
Price discovery with a small float and no trading history. Demand concentrates against a limited supply of shares, which frequently produces a large first-day gain.
What separates a good call from a naive one
First-day pops mostly benefit allocated investors, not buyers in the open market. Historically, buying at the close of day one has produced poor returns, and the lock-up expiry six months later adds supply.
Measured impact
Every logged event is measured against real closing prices: the move from the close before the event, compared with the S&P 500 over the same window.
Next day
Not measured yet
After 1 week
Not measured yet
After 1 month
Not measured yet
No measured verdict yet — 0 events logged. Three or more are needed before the data says anything useful.
The evidence (0)
Every row is a real event, measured against actual closing prices.
Measured from historical closing prices. Past reactions do not guarantee future ones. Not financial advice.