scholarly journals Market Reaction to iPhone Rumors

2021 ◽  
pp. 1-23
Author(s):  
Zhang Wu ◽  
Terence Tai-Leung Chong ◽  
Yuchen Liu
Keyword(s):  
Stock Price ◽  
Quantitative Data ◽  
Market Reaction ◽  
New Product ◽  
Qualitative Information ◽  
Highly Sensitive

 The paper studies the effects of new product rumors about the iPhone on the stock price of the Apple company. We scrape iPhone rumors from Macrumors.com, and obtain a dataset covering 1,264 articles containing 180 words on average between January 2002 and December 2015. Moreover, we construct a market-decided lexicon to transform qualitative information into quantitative data, and analyze what type of words and what information embedded in the rumors are apt to impact on Apple’s stock price. Unlike previous studies, we do not rely on the widely-adopted Harvard-IV-4 dictionary, as the coefficients of the words from the dictionary are neither significant nor consistent with their polarities, compared with our results. The paper obtains three main findings. First, the spread of rumors has a significant impact on the stock price. Second, positive words, rather than negative words, play an important role in affecting the stock price. Third, the stock price is highly sensitive to the words related to the appearance of the iPhone.

scholarly journals Recent Advancements in Enzyme-Based Lateral Flow Immunoassays

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3358
Author(s):  
Donato Calabria ◽  
Maria Maddalena Calabretta ◽  
Martina Zangheri ◽  
Elisa Marchegiani ◽  
Ilaria Trozzi ◽  
...  
Keyword(s):  
Lateral Flow ◽  
Qualitative Information ◽  
Eye Color ◽  
Commercial Success ◽  
Color Changes ◽  
Naked Eye ◽  
Future Developments ◽  
Highly Sensitive ◽  
Critical Overview ◽  
Detection Technologies

Paper-based lateral-flow immunoassays (LFIAs) have achieved considerable commercial success and their impact in diagnostics is continuously growing. LFIA results are often obtained by visualizing by the naked eye color changes in given areas, providing a qualitative information about the presence/absence of the target analyte in the sample. However, this platform has the potential to provide ultrasensitive quantitative analysis for several applications. Indeed, LFIA is based on well-established immunological techniques, which have known in the last year great advances due to the combination of highly sensitive tracers, innovative signal amplification strategies and last-generation instrumental detectors. All these available progresses can be applied also to the LFIA platform by adapting them to a portable and miniaturized format. This possibility opens countless strategies for definitively turning the LFIA technique into an ultrasensitive quantitative method. Among the different proposals for achieving this goal, the use of enzyme-based immunoassay is very well known and widespread for routine analysis and it can represent a valid approach for improving LFIA performances. Several examples have been recently reported in literature exploiting enzymes properties and features for obtaining significative advances in this field. In this review, we aim to provide a critical overview of the recent progresses in highly sensitive LFIA detection technologies, involving the exploitation of enzyme-based amplification strategies. The features and applications of the technologies, along with future developments and challenges, are also discussed.

Reaksi Pasar Dalam Bentuk Return Sebelum, Selama, dan Sesudah Peristiwa Piala Dunia Tahun 2014 pada Pasar Modal Asean

2015 ◽  
Vol 2 (02) ◽  
pp. 229-237
Author(s):  
Ratih Pratiwi ◽  
Muhammad Yusuf
Keyword(s):  
Data Analysis ◽  
Stock Market ◽  
Stock Markets ◽  
Quantitative Data ◽  
Market Reaction ◽  
Jel Classification ◽  
T Test ◽  
World Cup ◽  
Data Analysis Technique ◽  
Analysis Technique

A B S T R A C T Investor realized that the stock market gradually decreased during World Cup.The research aimed to analyze the return of market reaction which happenned before, during, and after World Cup 2014 on ASEAN stock market. The sample involved 181 companies were included in LQ-45, STI, FTSE BM KLCI, SET 50, PSEI index, which fulfilled the reseach criteria. The data analysis technique used was one sampel t-test with quantitative data. Based on the result, can be concluded that Indonesia and Thailand stock markets were higly effected by World Cup. A B S T R A K Investor mengetahui bahwa setiap piala dunia berlangsung, pergerakan saham melambat. Hal tersebut terbukti dengan terjadi penurunan return saham di pasar modal. Penelitian ini bertujuan untuk menganalisa reaksi pasar dalam bentuk return terjadi sebelum, selama dan sesudah piala dunia tahun 2014 pada pasar modal ASEAN. Sampel yang digunakan dalam penelitian ini sebanyak 181 perusahaan yang termasuk dalam indeks LQ-45, STI, FTSE BM KLCI, SET 50, PSEI dan memenuhi kriteria penelitian.Teknik analisa data menggunakan one sampel t-test dengan data kuantitatif. Hasil penelitian menemukan bukti bahwa pasar modal Indonesia dan Thailand sangat bereaksi terhadap peristiwa piala dunia tahun 2014. JEL Classification: G14, M20

scholarly journals The Market Reaction to the Appointment of Women on Corporate Boards: Evidence from the Italian Listed Companies

2017 ◽  
Vol 12 (12) ◽  
pp. 64 ◽  
Author(s):  
Patrizia Pastore ◽  
Silvia Tommaso ◽  
Antonio Ricciardi
Keyword(s):  
Stock Price ◽  
Market Reaction ◽  
Abnormal Returns ◽  
Value Added ◽  
Listed Companies ◽  
Corporate Boards ◽  
Women Directors ◽  
Future Performance ◽  
Price Performance ◽  
Strategic Value

During the 2012-2016 period, a large number of Italian companies appointed women directors in their boards, an unusual and unpredictable fact in the Italian industrial system. This paper investigates if any significant reaction has consequently occurred in the Italian stock market. It assumes that a significant market reaction would indicate the investors view the female board members as a strategic value added at the decision making level. To achieve the objective, it was collected a database consisting of 76 appointments of women directors in 67 Italian listed companies over the period 2012-2016 and then it was investigated the stock price performance of those companies in that five years span. The research hypothesis is examined empirically through the event study methodology in order to check the existence of abnormal returns on the appointment of women directors. Findings suggest that investors do not strongly believe that the simple appointment of women directors would have a positive effect on the future performance of firms.

Ontela PicDeck (B): Customer Segmentation, Targeting, and Positioning

2017 ◽  
pp. 1-6
Author(s):  
Mohanbir Sawhney ◽  
Kent Grayson ◽  
Patrick Dupree ◽  
Christine Hsu ◽  
Ryan Metzger ◽  
...  
Keyword(s):  
Quantitative Data ◽  
Customer Segmentation ◽  
Data Driven ◽  
Qualitative Information ◽  
Communication Plan ◽  
Customer Preferences ◽  
Positioning Strategy ◽  
Start Up ◽  
Average Revenue ◽  
Media Habits

Ontela, a technology start-up company, has introduced an innovative service called PicDeck that improves the mobile imaging experience for wireless subscribers. Ontela sells PicDeck to wireless carriers, who in turn private-label the service to their subscribers. Ontela must decide which customer segments it should target for the service and how to create a positioning strategy and a marketing communication plan to promote it. It must also consider the value proposition of the PicDeck service for wireless carriers (its direct customers), who need to be convinced that the service will lead to higher monthly average revenue per user (ARPU) and/or increased subscriber loyalty. Part A of the case provides qualitative information on customer personae that represent different customer segments. Students are asked to develop a targeting and positioning strategy based on this qualitative information. Part B provides quantitative data on customer preferences that can be used to identify response-based customer segments, as well as demographic and media habits information that can be used to profile the segments. Students are asked to revise their recommendations based on the additional quantitative data.The case reinforces the principles of data-driven customer segmentation, discusses the appropriate criteria for selecting segments, and provides a deeper understanding of the benefits and drawbacks of different approaches to identifying and evaluating segments. The case illustrates how the results of data-driven segmentation may run counter to approaches that rely on “gut feel” or qualitative information alone.

scholarly journals Portrait of Online Learning during the Covid-19 Pandemic (a Case Study on Solo Raya Vocational Teacher)

Teknodika ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 126
Author(s):  
Siswandari Siswandari ◽  
Sri Sumaryati ◽  
Susilaningsih Susilaningsih ◽  
Asri Diah Susanti ◽  
Nurhasan Hamidi ◽  
...  
Keyword(s):  
Online Learning ◽  
Quantitative Data ◽  
Working Hours ◽  
Learning Activities ◽  
Vocational School ◽  
Health Complaints ◽  
Qualitative Information ◽  
School Teachers ◽  
Vocational Teacher

This study aims to identify the implementation of online learning conducted by teachers to provide the best service to students. This can be seen from health, fitness, spirit, duration of services related to education, applications used, signal conditions, teacher readiness in providing services outside the provisions of working hours, available learning facilities, and several other online learning activities Covid-19 pandemic. This study involved 254 vocational school teachers in Solo Raya. Quantitative data is netted through questionnaires that are disseminated using Google Form facilities. Meanwhile, we obtained qualitative information from interviews designed using WhatsApp and telephone facilities. The results showed that 52.2% of teachers admitted to agreeing not to have any health complaints. Teachers are always fit for online learning, with 58.9% agreeing. Teachers were always excited when they were online, with 68.4% answering agreed. The implementation of online learning requires more service time. 64.9% of teachers provide services about 14 hours per day. 64.1% of teachers agreed that they are ready to provide online services to students outside the working hours. Teachers have RPP as a sign of online learning, with 68.8% of teachers agreeing

Student Use of Social Media

2010 ◽  
pp. 1211-1233
Author(s):  
Tamara L. Wandel
Keyword(s):  
College Students ◽  
Decision Making ◽  
Social Media ◽  
Social Networking ◽  
Interpersonal Communication ◽  
Quantitative Data ◽  
Self Esteem ◽  
Online Social Networking ◽  
Qualitative Information ◽  
Use Of Social Media

This chapter presents information on the usages and intent of social media by college students and administrators. Primary and secondary quantitative data is provided, as well as qualitative information obtained from interviews of multiple constituents. Researchers and postsecondary employees can more effectively examine technological trends in regard to online social networking for non-academic purposes after considering this data. Theories of self-esteem, interpersonal communication, decision making, and innovation diffusion are integrated throughout the chapter.

Student Use of Social Media

2009 ◽  
pp. 189-211 ◽  
Author(s):  
Tamara L. Wandel
Keyword(s):  
College Students ◽  
Decision Making ◽  
Social Media ◽  
Social Networking ◽  
Interpersonal Communication ◽  
Quantitative Data ◽  
Self Esteem ◽  
Online Social Networking ◽  
Qualitative Information ◽  
Use Of Social Media

This chapter presents information on the usages and intent of social media by college students and administrators. Primary and secondary quantitative data is provided, as well as qualitative information obtained from interviews of multiple constituents. Researchers and postsecondary employees can more effectively examine technological trends in regard to online social networking for non-academic purposes after considering this data. Theories of self-esteem, interpersonal communication, decision making, and innovation diffusion are integrated throughout the chapter.

scholarly journals Abnormal Return, Market Reaction around Rating Announcement in Tunisian Stock Market

2016 ◽  
Vol 8 (7) ◽  
pp. 322
Author(s):  
Wissem Daadaa
Keyword(s):  
Stock Price ◽  
Abnormal Return ◽  
Stock Return ◽  
Market Reaction ◽  
Stock Exchange ◽  
Price Change ◽  
Study Methodology ◽  
Book To Market Ratio ◽  
The Impact ◽  
Event Study Methodology

This paper tests the market reaction and the stock price change around rating announcements in Tunisian stock exchange using the event study methodology. We examine the impact of the change rating announcement on stock return firms from 2006 to 2010. The results show that only the negative rating with downgrades note which is associated to negative abnormal return. The market does not seem to be interested upgrades rating on the Tunisian market. The negative reaction of the market can be explained by leverage change, Book to Market ratio and the level of the rating fall.

scholarly journals Market Reaction Analysis of Annual Report Award Announcement: An Event Study Using Abnormal Return, Trading Volume Activity, and Stock Price

2020 ◽  
Vol 4 (1) ◽  
pp. 340
Author(s):  
Fitri Astuti ◽  
Anggi Setya Prayoga
Keyword(s):  
Stock Prices ◽  
Stock Price ◽  
Abnormal Return ◽  
Trading Volume ◽  
Annual Report ◽  
Market Reaction ◽  
Abnormal Returns ◽  
Volume Activity ◽  
Event Window ◽  
Before And After

This study intends to examine the differences in market reaction around the announcement of the Annual Report Award which is not only measured by abnormal return but is also measured using trading volume activity and stock prices. The data used are quantitative data in the form of a list of companies that received the Annual Report Award for the 2015-2018 period, the daily closing price of the ARA-winning company in the event window, the composite stock price index, the number of shares traded, and the number of shares outstanding. The event window is selected for 11 days because the long window period will blend with the effects of other events or confounding effects. The results of the study concluded that the market reacted around the announcement of the Annual Report Award for the 2015-2018 period measured using abnormal returns, trading volume activity, and stock prices. There is no difference in abnormal returns before and after the announcement of the 2013-2016 Annual Report Award period. Instead there are differences in trading volume activity and stock prices before and after the announcement of the Annual Report Award for the 2015-2018 period.

scholarly journals Reaksi Pasar Dalam Bentuk Return Sebelum, Selama, dan Sesudah Peristiwa Piala Dunia Tahun 2014 pada Pasar Modal Asean

2015 ◽  
Vol 2 (02) ◽  
pp. 229-237
Author(s):  
Ratih Pratiwi ◽  
Muhammad Yusuf
Keyword(s):  
Data Analysis ◽  
Stock Market ◽  
Stock Markets ◽  
Quantitative Data ◽  
Market Reaction ◽  
Jel Classification ◽  
T Test ◽  
World Cup ◽  
Data Analysis Technique ◽  
Analysis Technique

A B S T R A C T Investor realized that the stock market gradually decreased during World Cup.The research aimed to analyze the return of market reaction which happenned before, during, and after World Cup 2014 on ASEAN stock market. The sample involved 181 companies were included in LQ-45, STI, FTSE BM KLCI, SET 50, PSEI index, which fulfilled the reseach criteria. The data analysis technique used was one sampel t-test with quantitative data. Based on the result, can be concluded that Indonesia and Thailand stock markets were higly effected by World Cup. A B S T R A K Investor mengetahui bahwa setiap piala dunia berlangsung, pergerakan saham melambat. Hal tersebut terbukti dengan terjadi penurunan return saham di pasar modal. Penelitian ini bertujuan untuk menganalisa reaksi pasar dalam bentuk return terjadi sebelum, selama dan sesudah piala dunia tahun 2014 pada pasar modal ASEAN. Sampel yang digunakan dalam penelitian ini sebanyak 181 perusahaan yang termasuk dalam indeks LQ-45, STI, FTSE BM KLCI, SET 50, PSEI dan memenuhi kriteria penelitian.Teknik analisa data menggunakan one sampel t-test dengan data kuantitatif. Hasil penelitian menemukan bukti bahwa pasar modal Indonesia dan Thailand sangat bereaksi terhadap peristiwa piala dunia tahun 2014. JEL Classification: G14, M20

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