Earnings season heats up: Are investors beginning to reward good results again?Wall Street's earnings season began cautiously, with investors punishing disappointments more severely than they rewarded positive surprises. But fresh trading activity on October 19 suggests that sentiment may be stabilizing. With Netflix, Tesla and Meta preparing to report, the next question is whether investors are becoming more willing to reward strong corporate results, or whether this improvement is only temporary.Early earnings reactions were more negative than positiveThe third-quarter earnings reporting season, taking place during the fourth quarter of 2026, began with some uncomfortable signals for stock market bulls.An investingLive review of earnings reactions from October 13-16 identified several signs of a selective and defensive market:Three of the four trading sessions produced negative capitalization-weighted earnings reactions, meaning larger companies had a greater influence on the results.Downside moves exceeding options-implied expectations outnumbered upside surprises by 11 to 6.Investors were not consistently rewarding corporate earnings announcements, even as individual companies continued reporting solid business performance.These observations matter because good earnings are not necessarily enough to make a stock rise.A company may report higher revenue, stronger profits and encouraging business developments, yet still see its shares decline.Why?Because stock prices reflect expectations about the future, not just the financial results being announced today. If investors were already expecting an exceptional quarter, a merely good quarter may disappoint.The opposite can also happen. A company with relatively modest results may see its shares rally if investors feared something much worse.October 19: The first encouraging signs?The latest October 19 intraday earnings reactions offer a somewhat more constructive picture.Among six companies with usable earnings reactions in the supplied investingLive analysis:Four stocks advanced, while two declined.Positive breadth reached 66.7%, meaning two-thirds of the companies gained.The capitalization-weighted reaction was approximately +1.20%.None of the five companies with comparable options-implied expected moves had exceeded its estimated range at the observation time.This is an improvement worth watching, but not yet a decisive turnaround.The most interesting distinction is that stocks were rising without necessarily producing unusually large upside surprises.An options-implied move is an estimate of how far a stock might move around an event, inferred from options prices. When a stock moves beyond that range, the reaction may indicate that investors are repricing the company more dramatically than the options market had anticipated.October 19's early data shows more stocks participating on the upside, but not yet evidence of exceptional positive repricing.That difference matters.It could be the beginning of stabilization. Alternatively, it could simply represent a relatively favorable collection of companies reporting on one particular day.The October 19 observations are intraday snapshots, not final closing returns. The sample is also small and has not established a confirmed change in the broader earnings environment.Cleveland-Cliffs and Fifth Third offer encouraging examplesTwo companies illustrate how different types of corporate results can attract buyers.Cleveland-Cliffs (CLF): A stronger outlook captures attentionThe steel producer's shares were up approximately 7.84% in the supplied October 19 intraday snapshot.Cleveland-Cliffs reported a substantial improvement in third-quarter profitability and presented a more optimistic earnings outlook. That combination gives investors something beyond the reported quarter to assess: whether the company's future profitability may improve more than previously expected.The relevant question now is whether buyers maintain their enthusiasm beyond the immediate reaction.A strong first-day gain is encouraging, but holding that gain over subsequent sessions would provide stronger evidence of sustained investor interest.Fifth Third Bancorp (FITB): Banking resilience gets a measured responseFifth Third gained approximately 1.42% in the supplied snapshot.The regional banking group reported resilient credit performance, sequential growth in net interest income and progress integrating Comerica.Its more measured share-price reaction illustrates another aspect of this earnings season: investors may be receptive to improving fundamentals without necessarily bidding shares sharply higher.Elsewhere, the picture remains mixed. Recent rolling weekly performance has been comparatively strong for Ericsson, while Charles Schwab, Interactive Brokers and Prologis have experienced further weakness.Those weekly returns are not isolated earnings reactions, but they reinforce the importance of evaluating individual companies rather than assuming that the entire market is moving together.Netflix earnings on October 20: A test of expectationsNetflix (NFLX) reports third-quarter results on Tuesday, October 20.Investors will be examining whether the streaming company can sustain growth while defending profitability and maintaining engagement in an increasingly competitive entertainment market.The important questions include:Engagement and revenue: Is Netflix generating sufficient revenue growth from its audience, advertising business and programming investments?Profitability: Can the company maintain attractive margins while competing for viewers and spending on content?Guidance: Does management's outlook support the growth expectations already embedded in the share price?Even a headline earnings beat may not be enough if management's forward outlook disappoints.For existing shareholders, the result may help assess whether the longer-term investment thesis remains intact. For traders, the initial share-price reaction and its ability to hold could be just as informative as the reported numbers themselves.Tesla and Meta on October 21: Two different tests of investor confidenceWednesday brings two major earnings announcements, each carrying broader market implications.Tesla (TSLA): How much future growth is already priced in?Tesla investors face several important questions, including automotive profitability, demand, energy storage growth and investment in future technologies.The company's October 2 delivery report showed more than 486,000 vehicles delivered during the third quarter. However, vehicle deliveries alone do not establish profitability.Investors will want to understand how sales volumes translate into margins, cash flow and management's outlook.A strong reaction could indicate that investors are willing to look beyond near-term spending pressures. A disappointing reaction could suggest that the market is becoming less patient with ambitious future-growth expectations.Meta Platforms (META): Is AI spending delivering sufficient returns?Meta presents a different challenge.Its advertising business provides an established source of profitability, while investment in artificial intelligence and supporting infrastructure creates additional spending demands.The central question is whether advertising growth and business efficiency are sufficient to justify the scale of investment.Positive operating results accompanied by higher spending projections could produce a complicated market response.Strong profitability, credible guidance and evidence that investment is creating value would provide a more constructive combination.Because these businesses influence major stock indices, their earnings reactions could also affect sentiment beyond their own shareholders.What could confirm an improving earnings environment?Rather than declaring earnings season bullish or bearish based on one favorable session, traders and investors can watch for three developments.1. More stocks rising after earningsIf positive breadth persists across a larger and more diverse group of reporting companies, it would strengthen the case that investor sentiment is improving.2. More meaningful upside reactionsPositive share-price moves are encouraging. But repeated moves exceeding options-implied expectations would suggest investors are becoming more willing to revalue companies upward.3. Stocks holding their gainsOne of the most useful tests comes after the initial excitement.If a stock rallies following earnings and retains much of that advance over the following sessions, it suggests that buyers are continuing to support the new valuation.Conversely, repeated reversals of initial rallies would indicate that enthusiasm remains fragile.The same principle applies to negative reactions. A stock that initially falls but subsequently recovers can provide evidence that sellers are losing influence, although one recovery alone does not prove a durable bottom.What if the improvement fails?There is an important alternative scenario.October 19's stronger reactions could prove temporary, especially if upcoming large-company reports disappoint investors.Warning signs would include a renewed deterioration in earnings-reaction breadth, more stocks falling beyond their expected trading ranges, and strong companies struggling to hold gains after reporting.The next wave of technology earnings will provide important evidence.Microsoft and Alphabet are scheduled to report on October 28, followed by Amazon on October 29. Their cloud operations, AI-related investment and profitability outlooks will offer additional insight into how investors are assessing some of the market's most influential businesses.The key takeaway for traders and investorsThe most useful question this earnings season may not be simply, "Did the company beat expectations?"It may be:"Did investors reward the results, and did they continue to reward them after the initial reaction?"For existing shareholders, earnings provide an opportunity to reassess business fundamentals, valuation and the longer-term investment case. A short-term price decline does not automatically invalidate an otherwise sound business thesis.For traders and investors considering new positions, it can be useful to distinguish the immediate reaction from subsequent price behavior. A sharp move can create an opportunity, but it can also introduce significant risk when volatility and uncertainty are elevated.As of October 19, the earnings environment remains selective, with tentative signs of stabilization rather than a confirmed bullish shift.Netflix, Tesla and Meta may provide some of the clearest evidence yet of whether investors are becoming more willing to reward good corporate performance.And for the broader stock market, that distinction could matter more than the number of companies that beat analysts' estimates.Educational financial news from investingLive. Not investment advice. Trading and investing involve risk of loss.------------------------There's always something new to learn about the markets. Explore investingLive's educational video collection for quick explanations and useful insights. This article was written by Itai Levitan at investinglive.com.