Cathie Wood is one of the easiest growth investors to follow. Every trading day, she posts her daily transactions for the Ark Invest family of aggressive growth exchange-traded funds. She was particularly busy in kicking off the new trading week.

What did Wood buy on Monday? She added to her existing stakes in Tesla Motors (NASDAQ: TSLA), Pinterest (NYSE: PINS), and Roku (NASDAQ: ROKU) yesterday. Let's take a closer look.

The electric-vehicle leader's stock has been moving as fast as its signature cars, but unfortunately sometimes it's stuck in reverse. Tesla stock is trading 57% below last year's all-time high, but it has bounced back in a major way since bottoming out in early January.

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Source Fool.com