Before revision:  We begin with a relatively simple new algebraic-type theory of news impact on share-prices, which describes well their power growth, periodicity, logarithmic periodicity, and the market phenomena like price targets and profit-taking ;
After revision:  We begin with a relatively simple new algebraic-type theory of news impact on share-prices, which describes well their power growth, periodicity, and the market phenomena like price targets and profit-taking ;