Monitor recent IPOs (<180 days) and upcoming SPAC completions, ranked by early return, relative strength, volume and float
Tracks recently listed companies and upcoming deals. It filters for stocks listed within a configurable window (default 180 days), scores them on early return, relative strength, volume, and float size, and enriches them with IPO and lock-up data from the listings feeds when available. The output is a ranked watch list, with lock-up expiry dates flagged as risk notes. It lists recent IPOs and SPAC completions with these figures; some fields degrade gracefully when the listings feeds are missing.
Recently listed companies - a market segment with two of the best-documented anomalies in finance.
THE FIRST: UNDERPRICING. IPOs have historically closed their first day substantially above their offer price - the 'pop'. It is documented across decades and across countries, and the leading explanations are informational: the winner's curse facing uninformed investors who receive full allocations only in weak deals, and deliberate underpricing to ensure a successful launch. The practical consequence for anyone reading this screener is that the pop accrues to allocated subscribers, not to a buyer in the aftermarket - by the time a stock is screenable it has already happened.
THE SECOND: LONG-RUN UNDERPERFORMANCE. Ritter (1991) documented that IPOs underperformed comparable seasoned firms over the following three years. Proposed explanations include windows of opportunity - firms listing when sentiment for their sector is high - and over-optimism that decays as results arrive. Later work has debated its magnitude and how sensitive it is to the benchmark chosen, which is itself instructive about how anomaly evidence should be read.
SO THE TWO RESULTS TOGETHER give the shape of the segment: a sharp initial gain that is unavailable to most, followed by a long period of weakness on average. That is a genuinely useful prior for anyone screening recent listings.
THE LOCK-UP IS THE SCHEDULED EVENT, and the reason it belongs in this screener. Insiders and pre-IPO investors are contractually barred from selling for a period, commonly 180 days. At expiry, a large block of supply becomes sellable at once - and Field and Hanka (2001) documented statistically significant negative abnormal returns around lock-up expirations, with permanent increases in trading volume. Note the efficiency puzzle worth teaching: the date is KNOWN IN ADVANCE, so a price effect at a fully anticipated date is hard to square with semi-strong efficiency, and it is usually explained through downward-sloping demand curves for stocks - the same explanation Shleifer offered for index inclusion.
FLOAT SIZE IS THE FIELD THAT TIES IT TOGETHER. A small float means a small tradable supply against whatever demand exists, which amplifies volatility - and it means the lock-up expiry is proportionally larger relative to what already trades.
A SHORT HISTORY IS THE STRUCTURAL LIMIT. A recent listing has too little price history for most technical measures, no seasoned earnings record, and analyst coverage that starts only after a quiet period.
The 180-day default window and the scoring weights are our own convention.
Published reports are readable without an account. The newest is Ether (ETH) and XRP extend a month-long slide as Bitcoin falls below $75,000: trend, momentum and news (Nov 9, 2026). Create an account to run research on the stocks and crypto you choose.