As Wall Street surges, more are worried about valuation

The US stock market's surge since the election has reignited a debate on valuation and whether the market can go higher still after hitting some significant milestones.Analysts say Trump's more conciliatory tone during his Tuesday night congressional address lifted hopes he will win approval for tax cuts and other growth measures strongly backed by the market.Market watchers also are heartened by improving US data on jobs, consumer confidence and service sector activity.