U.S. stock futures are slightly lower in pre-market trading, following a mixed session in overseas markets. This cautious tone comes as investors look ahead to

U.S. stock futures are slightly lower in pre-market trading, following a mixed session in overseas markets. This cautious tone comes as investors look ahead to key economic signals after Wall Street recently set new highs. Stocks to Watch: Ciena Corporation:** Shares surged in after-hours tradi…