Compare its move to a broad index on the same day. If the index fell and your stock fell by a similar amount, very little happened to the company — it was carried. What is left after removing the market's move is the part that is specific to the business.
On any given day a share price is pushed by two forces. One is company-specific: its results, its contracts, its regulator. The other is the tide — interest rates, the economic mood, a sell-off that hits everything at once.
Both show up as one number on your screen. The screen cannot tell you which force produced it, and most of the time the tide is the larger of the two.
Look at what a broad index did on the same day. If the whole market dropped and your stock dropped by a comparable amount, the company was not singled out.
If your stock fell hard on a day the market rose, that difference is the interesting part — something happened to that business specifically.
Stocks do not all respond to the market equally. Some habitually move more than the index in both directions, others less. A stock that typically moves half again as much as the market is not being singled out when it falls further on a bad day.
Knowing a name's usual relationship to the market is what stops an ordinary day from reading as a company event.
It is easy to find a headline that seems to explain any move, because there is always a headline. The question that comes first is whether the move needs a company-specific explanation at all.
If the market did the same thing, the headline is probably a coincidence rather than a cause.
One question, no account: what did you come here for, and did you find it? A person reads these, and they shape what gets written next.
From StockMotive — the honest why behind every market move. Educational information only, not investment advice.