Newsig guide
How News Affects Stock Prices: Market Reaction Guide | Newsig
A market headline is only the starting point. Prices react to the gap between expectations and new information, the way that information travels across related assets and whether the first move holds after the news is absorbed.
Prices react to surprises, not headlines alone
Investors compare a release, result or announcement with what was already expected. A positive headline can produce a fall if the outcome is less strong than the market had priced in, while a modest update can move a stock when positioning was one-sided.
Separate the first move from follow-through
The first minutes after news reflect liquidity, positioning and fast interpretation. Later price action incorporates more analysis, related markets and new expectations. Looking at both the initial response and the following 24-hour window avoids treating one volatile candle as the whole story.
Compare the company, sector and index
A stock can rise because of company-specific news, because its sector is being repriced or because the entire market is moving. Comparing the company with a relevant sector fund and broad index helps identify which layer of information actually changed.
Earnings and macro news travel differently
Earnings change expected cash flows for a company, while inflation, jobs, rates and growth data can change discount rates across many assets. The same macro headline may therefore lift one group of stocks and pressure another, depending on duration, exposure and starting valuation.
How Newsig measures the reaction
Newsig maps tracked headlines to relevant instruments and records the largest move and net change during the 24 hours after publication when market data is available. These are historical observations for comparison, not proof of causation, a forecast or investment advice.