A market price would develop and it would become possible to recognise trends and make forecasts, helping sellers and buyers.
Easyjet has dropped 94p to £17.96 despite raising its first half profit forecasts, helped by favourable currency moves.
News that the World Bank had cut its global growth forecasts helped set the downbeat tone, while the new unrest in Iraq did not help matters.
Smiths said it expected to deliver full-year figures in line with forecasts, helped by a strong performance from its John Crane business, which manufactures seals and associated products.
Swiss business Roche issued a cautious outlook for 2009 after its full year results missed forecasts, helping send Astra 96p lower to £26.71.
Texas Instruments, the chip maker, said on Monday that profit and sales in its current quarter would be at the high end of its forecasts, helped by increasing demand for phone systems and industrial machinery.
The Starbucks Corporation said today that its fiscal third-quarter profit rose 20percentt, beating Wall Street forecasts, helped by new summer drinks and a prepaid purchase card that proved popular with customers.
Elsewhere Prudential put on 37p to £13.98, making it the biggest riser in the FTSE 100 after operating profits for 2013 jumped 17% to £2.95bn, the top end of analyst forecasts, helped by double digit growth in Asian markets.
Stagecoach was among the biggest mid-cap risers after it said it expects to beat City earnings forecasts, helped by a strong performance from its rail business and plans to invest in more environmentally friendly buses.
At LPL Financial, he establishes market forecasts, helps define the tactical allocation used to manage $77 billion in assets and authors several flagship research publications, including weekly market reports and white papers on investment decision making.
