Inom aktiemarknaden finns det en mängd olika teorier som förklarar investeringsbeteendet hos individer. Grunden för beslutsfattande är inte alltid uppenbart. Beslutens påverkan på avkastningen är dock uppenbart och viktigt för investerare. Studier från den kinesiska aktiemarknaden påvisar att investerare med högst portföljvärde gynnas av aktiehandel på grund av informativa fördelar som investerarna besitter. Denna studie syftar därav till att studera investeringsbeteenden hos de högsta inkomsttagarna på svenska aktiemarknaden. Investerare med högst inkomst benämns som superinvesterare och befinner sig på och över den 99:e percentilen i populationen. Urvalsgruppen superinvesterare uppgår till, i genomsnitt, 20 413 individer. Datamaterialet för studien omfattar år 2014–2016 och kommer från Visby Research In Stock Ownership på Uppsala Universitet, Campus Gotland. De studerade variablerna består av inkomst, portföljvärde, antal aktier som innehas och Herfindahl-Hirschman index. På grund av restriktioner för behandling av data med känsliga personuppgifter presenteras data i genomsnittliga siffror för perioden, och delas även in i olika åldersgrupper. Studien tillämpar univariat analys och multivariat regressionsanalys där den statistiska signifikansen undersöks. Herfindahl-Hirschman index används som ett mått för att mäta koncentrationen (diversifieringen) i portföljen.     Studien utgår från teorier inom området behavioral finance, risk inom finansiell teori och portföljteorin. De utvalda teorierna inom området behavioral finance studerar investeringsbeteendet i förhållande till genusperspektiv, inkomstnivå och risktolerans samt investeringsbeteendet hos höginkomsttagare. Samtliga teorier valdes för att frambringa olika perspektiv inom området men även för att ge en grundläggande uppfattning och ökad förståelse för hur investerare agerar på aktiemarknaden. Studiens resultat visar att investerare på och över den 99:e percentilen, det vill säga superinvesterare, äger koncentrerade portföljer med höga portföljvärden. Det kan innebära att superinvesterare besitter informativa fördelar med tanke på att de i genomsnitt äger ett aktieinnehav. Resultatet visar även att portföljvärdet ökar i takt med åldern vilket stämmer i enlighet med teorier som förklarar de bakomliggande faktorerna till det ökade portföljvärdet. Utifrån genusperspektiv pekar resultatet på att män har högre värden än kvinnor i de studerade variablerna. Det är emellertid viktigt att ha i åtanke att andelen män är fler än kvinnor i den studerade percentilgruppen. / In this thesis, we will examine the investment behavior of the ’highest income earners’, also known as ’superinvestors.’ The highest income earners are defined as those that are at or above the 99th percentile in the Swedish stock market. Previous studies have provided evidence to suggest that investors with the highest portfolio value, benefit greatly from stock trading due to the associated informative benefits. We will critically analyse how investors in the Swedish stock market choose to allocate their shares in proportion to their portfolio value and income. The assigned hypotheses are designed to enable us to investigate and answer important questions in the area. The group of our selection of superinvestors amounts to an average of 20,413 individuals. The data retrieved from the study is from Visby Research In Stock Ownership at Uppsala University, Campus Gotland which covers the period between 2014 and 2016. The studied variables are income; portfolio value; number of shares held and the Herfindahl-Hirschman Index. The analysis is based on average figures due to restrictions on processing data with sensitive personal information. From our results, it is suggested that investment behaviour differs according to the individuals’ sex and age dispositions. On an average, women tend to invest more carefully and own less share capital than men. Women also earn, on average, significantly less income than men. In relation to age, younger individuals also owned less investment portfolios than their older counterparts. Superinvestors were also found to own concentrated portfolios of high value. In evidential reliance, there are several theories that provide explanations for such common patterns of investment behaviour.

Background and Problem: Global climate change presents the biggest challenge humanity has ever faced. As the Ecological Footprint metric and behaviour towards sustainable investment can present essential contributions to humanity’s sustainability transition, they have gained significant importance over the last years. However, it is largely unexplored if living and consuming sustainably also affects how savings are allocated when investing.  Purpose: The purpose of this study is to contribute to the current body of knowledge by studying the motivations and backgrounds that drive the decision of individuals to invest sustainably. Thus, we investigate the relationship between people’s Ecological Footprint and their sustainable investment behaviour. Method: This study follows a positivist research approach where quantitative data is gathered through a structured questionnaire from 290 respondents with financial literacy and sustainability awareness. The results are analysed through a logistic regression and then interpreted and discussed in the context of the frame of reference.  Conclusion: The results indicate that individuals with a lower Ecological Footprint and thus a higher awareness of sustainability are more likely to invest sustainably. Consequently, this study showed that individuals who consumed more sustainably tend to act more sustainably in other areas and levels. Moreover, this study adds new knowledge to the literature regarding individual’s consumption behaviour and its relationship with sustainable investments.

The purpose of this study is to examine the investment behaviour of women during the current recession and how demographic factors impact psychological biases related to investment behaviour. This research aims to examine the impact of age, marital status, education, income, cultural background and financial literacy on various biases such as overconfidence, confirmation bias, herding behaviour, representativeness bias, anchoring bias, risk- and loss aversion.  A questionnaire was conducted to collect data, resulting in a dataset of 558 observations. Using a deductive approach, based on theories of thirty-six hypotheses was tested using ordered logistic regression analysis. The primary findings revealed multiple connections between the demographic profiles of female investors and their investment behaviours, concerning psychological biases. Furthermore, this paper contributes to the ongoing debate about the relationship between investment behaviour and economic recession and provides stakeholders with valuable insights to tailor their communications and strategies to engage female investors. By analysing existing behavioural finance theories and empirical data, the study aims to improve understanding of women's investment preferences and attitudes across different demographic groups. Finally, the study aims to increase women's interest in managing their wealth and improving their financial decisions.

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