HSBC's share price was under pressure on Tuesday after broker Investec lowered its rating for the stock from 'add' to 'hold', saying that the bank's upcoming fourth-quarter results could disappoint.The broker said that a weak showing from the bank on 23 February will "trigger downgrades", as it lowered its target price for the shares from 650p to 630p.Broker Numis Securities said it expects upgrades to consensus estimates for Easyjet after the budget airline impressed the market with its first-quarter update and positive outlook on Tuesday. It kept a 'buy' rating."In our opinion, investors should be encouraged by a positive outlook statement in which management points out that it sold record numbers of seats to business travellers in the first quarter and that Easyjet is well positioned to continue to deliver strong returns and growth to shareholders."Dixons Carphone's stock took a tumble on Tuesday after US banking giant Morgan Stanley lowered its recommendation on the retail stock from 'equal weight' to 'underweight'.Analysts said that the shares were significantly overvalued and the valuation too expensive for a company which is "not a growth business".