Shares of Amazon (NASDAQ:AMZN) stock are in focus following several buys from Ark Invest’s Cathie Wood.Yesterday, five out of the six Ark funds increased their positions in the e-commerce giant. These include the ARK Innovation ETF (NYSEARCA:ARKK) and the ARK Fintech Revolution ETF (NYSEARCA:ARKF). The ARK Genomic Revolution ETF (BATS:ARKG) was the only fund left out of the party, as its name suggests.That wasn’t Wood’s only buy this week, as she loaded up $35 million worth of AMZN on Monday. Her Amazon pur ...