Market overview: FTSE closes down two points at 6,775
1630: Close After a relatively quiet day, much of which was spent waiting for a speech from Fed Chair Janet Yellen, the FTSE 100 closed down 2.41 points at 6,775.25. The index suffered a sharp dip late morning, although this was largely recovered by early afternoon. Yellen said that there continued to be "remaining slack in the labour market", which she said needs to be "more nuanced" due to the "considerable uncertainty" in the employment level.
1504: US stocks have fluctuated in early deals but are slightly lower across the board with the S&P 500 down 0.2% after hitting a record close yesterday. The Dow and Nasdaq are both 0.1% lower. Yellen has said that the Fed's emphases is shifting towards a debate over when to hike rates. ""With the economy getting closer to our objectives, the FOMC's emphasis is naturally shifting to questions about the degree of remaining slack, how quickly that slack is to be taken up, and thereby to the question of under what conditions we should begin dialing back our extraordinary accommodation," she said at Jackson Hole.
1334: Apple shares are lower in pre-market trade in New York on the back of reports that the tech giant's iPhone 6 could face delays. According to Reuters, suppliers are struggling to get enough screens ready for the iPhone 6 launch after panel production was disrupted. The news agency said it's unsure whether disruptions will delay the launch or just limit the number of smartphones available when the gadget is unveiled next month.
1247: Ukraine's state security chief has reportedly said that it will not use force against the Russian aid convoy which has entered its territory.
1231: The Wall Street Journal Europe cites Ukrainian authorities as having said that 34 trucks from said convoy have entered Ukraine's territory.
1143: Reports of 90 trucks from the Russian aid convoy entering Ukraine without persimmon have knocked UK markets into the red. Ukrainian state security chief Valentyn Nalivaychenko has been quoted as saying that the move is a "direct invasion by Russia of Ukraine". It was agreed that the convoy could cross the border accompanied by the Red Cross, but it chose not to escort the convoy because of the "volatile security situation". The FTSE 100 is now down 20 points at 6,757.
0957: Vodafone (+0.9% at 204.45p) is extending gains made yesterday on the back of rumours that advisers of AT&T are working on a cash bid worth over 300p a share. AT&T ruled out an offer back in January, meaning that it is now free to revisit an approach under UK takeover 'cooling off' rules.
0927: Oilfield services group Petrofac is trading lower (-0.8%) after its chairman of three years, Norman Murray, announced his resignation from the board. The company said that he will step down with immediate effect for "compassionate reasons".
0820: UK stocks inched marginally higher at the opening bell, as expected, as investors balanced a strong overnight performance from the US and Asia with a degree of caution in the lead up to Janet Yellen's speech scheduled later today at Jackson Hole. Banking and Telecoms groups are leading this upside this morning, while miners and the LSE are much closer to the bottom of the pile, despite the latter reporting that listing had bounced back in the first quarter with an increase in both the number of companies joining its markets and the amount of money raised. The FTSE 100 is up 1.87 points at 6,779.53.