The stock market is looking robust, but also showing some signs of excessive bullishness. Apple leads four key names to watch.
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Over 10 million people are playing the markets using Robinhood, the red-hot stock trading app that was offering no-commission stock trades long before the major online brokerages followed suit. The list of the 100 most popular Robinhood stocks is dotted with blue-chip companies as well as some broad-based exchange-traded funds. One of the most popular Robinhood stocks is Apple (NASDAQ: AAPL).