Avoiding wealth decrease - an option for insiders?

The purpose of this thesis is to broaden the research field and contribute with a new perspective regarding insider trading and insiders’ ability to avoid negative abnormal return. An event study framework is applied to examine market efficiency on Swedish stock market. Market model is used as an equilibrium model for identifying abnormal returns. The theoretical framework is built on efficient market hypothesis, concept of information asymmetry and signaling hypothesis. The data about insider transactions and stock performance for time period 2000 to 2010 is studied. The findings contradict the efficient market hypothesis in its strongest form. Insiders in Swedish listed firms are able to avoid wealth decrease by selling their shares prior to decline in stock price

On the Access of Blood-Borne Dyes to Various Tumour Regions

THE degree of blood supply in vital and non-vital tumour regions has long been of interest in tumour biology in its various aspects. In this paper evidence is presented that many tumours contain substantial regions which cannot readily be reached by blood-borne substances, and that these regions contain living cells capable of starting tumours when transplanted into new hosts. These regions were easily mapped out by changing the colour of the systemic blood with a harmless dye which, in addition, coloured the interstitial fluid, but did not enter the living cells (Goldacre, 1955, unpublished data; Goldacre and Sylven, 1959; Holmberg, 1961). Preliminary data (Goldacre and Sylven, 1959) indicated that in some tumours in rats and mice the only region presenting an open connection with the systemic circulation was a thin peripheral zone varying from a few millmetres to a tenth of a millimetre in thickness or less. Somewhat similar observations were made by Owen (1960) in spontaneous tumours of cats and dogs, using the same method. The blood, often visible in the regions unreached by the dye, was blocked off from the general circulation. In the present communication mor

Coronary Artery Perforation and Regrowth of a Side Branch Occluded by a Polytetrafluoroethylene-Covered Stent Implantation

Stenting of the right coronary artery stenosis caused coronary perforation and profound dye (blood) extravasation in a 69-year-old female patient. Instantaneous balloon inflation followed by implantation of a polytetrafluoroethylene- (PTFE-)covered stent sealed the coronary perforation, restored the blood flow, and perceivably caused acute occlusion of a large side branch (SB). The immediate in situ balloon inflation prevented the development of cardiac tamponade. Surprisingly, followup coronary angiography 4 and 11 months later showed spontaneous recanalization of the SB occluded by PTFE-covered stent. The SB was filled through a channel beginning at the end of the covered stent streaming retrogradely beneath it toward the SB ostium. Up to the best of our knowledge, this is the first described case of late spontaneous recanalization of as SB occluded by a PTFE-covered stent