What happens when a stock falls below $1: 436 cases

The dollar is the only price level in US equities with a rule attached to it. Close below it for 30 consecutive business days and the exchange sends a deficiency notice; regain it with 10 consecutive closes at or above $1 and the clock stops. Everything traders believe about sub-dollar stocks sits on top of that mechanism, and most of it is folklore. We have 181 sessions of daily bars for every US symbol, and vendor split records to match. So the question is answerable: when a stock that has been trading normally falls below a dollar, what happens next?

1. The break is usually temporary

We flagged the first session a symbol closed below $1 after at least 20 consecutive closes at or above it. That excludes the chronically cheap, which are a different population entirely. Then we followed each one for 60 sessions, roughly a quarter, and classified the outcome by the exchange's own test. 436 breaks, and more than half were back above a dollar for ten straight sessions inside three months. Median time to get there was 22 sessions. That is not the picture most people carry. A break below $1 reads as terminal because the cases that end in a reverse split are the ones anybody remembers.

2. Time converts the unresolved into the bad outcomes

Sixty sessions is short against a rule that allows 30 business days before notice and 180 calendar days to cure. So we ran it again at 120 sessions, which costs sample: only 206 breaks have that much follow-up inside the window. The recovery share barely moves. What moves is the unresolved bucket, which drains into delisting and reverse splits: delisting doubles, reverse splits rise by half again. Median time to regain stretches from 22 sessions to 33. Read together, the two columns say the outcome is mostly decided early. A name that is going to climb back does it quickly; a name still under water after three months is working through the regulatory clock, and the clock has two exits, neither of them good for a holder.

3. The liquid ones resolve harder in both directions

Most sub-dollar trading is not trading. Across the window there were 129,824 symbol-days with a close under $1, and only 9.3% of them cleared $1,000,000 of turnover. On a median session 720 symbols closed below a dollar; almost none of them were on anyone's screen. Restricting to breaks where the stock did at least $1,000,000 on the day it broke, 63 of the 206: Liquidity does not protect the name. It resolves it. The unresolved share drops by seven points and every other bucket grows, recovery and failure alike. Volume is the market forming an opinion, not the market being kind.

4. What this changes

For anyone trading the low end, the practical content is in section 2, not section 1. The base rate is comforting and useless: knowing that 55.0% recover does not tell you which. What is usable is the shape of the clock. Recovery is front-loaded, failure is back-loaded, and the gap between them widens with every month the stock stays under. For anyone building data, the relevant fact is that 4.4% of these names reverse split inside 120 sessions. On unadjusted bars a reverse split is an overnight gain of several hundred percent, which is how those names arrive at the top of a gainers screen having gained nothing. We measured that separately: one day in five, a top gainer is really a reverse split. The sub-dollar population is where those events come from. And the 9.7% that delist are the reason a universe built from today's ticker list quietly excludes its own failures. That one we also measured: 815 tickers vanished in nine months. Limitations The follow-up windows are shorter than the rule they are measuring. A stock that breaks below $1 can spend 30 business days accruing a notice and another 180 calendar days curing it, which is longer than our 120-session window. So the delisting and reverse-split shares here are floors, and the unresolved bucket contains cases that had not finished yet rather than cases that ended well. The direction of the bias is knowable even if the endpoint is not: both windows show the same drift. The 120-session figures rest on 206 breaks against 436 at 60 sessions, because a break late in the window cannot be followed. 405 symbols were excluded on that basis. The two columns in section 2 are therefore not the same stocks, and the comparison is between two overlapping samples rather than a single cohort tracked twice. Delisting is inferred from a symbol ceasing to appear in daily bars for the remainder of the follow-up, not from an exchange notice. A ticker change looks identical to a delisting under that test, which overstates the delisted share by an unknown amount. The regain test uses closing prices; exchanges apply the same 10-session rule, so that part matches the mechanism directly. Our universe is symbols carrying a daily bar, which includes funds, warrants, units and preferred issues alongside common stock. We did not separate them here. Of 14,180 symbols, 674 never closed at or above $1 in the window and 12,895 never produced a qualifying break.