Wall Street ended an ambivalent session lower today, with investors concerned that stock prices are too high despite a better-than-expected employment report. Still, the three main gauges posted their second straight weekly gain.

Wall Street extended its advance into a sixth straight week today after a brokerage upgrade of IBM raised investor expectations of a rebounding economy. The Nasdaq composite reached an 18-month high.

Better-than-expected profits from Citigroup and Bank of America lifted Wall Street today as investors grew more optimistic about a strong economic rebound. A late-day sell-off, however, limited the gains.

Wall Street pushed higher today as a drop in jobless claims and an upbeat outlook from IBM boosted US investors’ hopes that the economy was improving.

Wall Street mostly retrenched today as investors couldn’t resist a chance to cash in quick gains from a two-day rally.