| I am doing a copy/paste of the entire article in IBD, not just the section on ABMD, in case other stocks held by the mutual fund are of interest to others (AMZN, NFLX, BABA). For anyone just interested in ABMD, though, I am copying it before the entire article: 
 "Abiomed is in the dynamic growth bucket. The stock replaced leisure-lodging stock Wyndham Worldwide ( WYN)  in the S&P 500 index. Many funds, especially index funds, will add  Abiomed to their portfolios just because it is now part of the popular  benchmark. "Abiomed has had the biggest innovation in cardiac surgery in years  by having a balloon pump to help patients extend the life of their  hearts during cardiac arrest," lead manager Kelly said. "It works  substantially better than all preceding technologies."
 
 The company's market opportunity is about 10 times what its market is  today, Kelly says, as its technology grabs market share over the next  five to 10 years."
 
 Growth Stocks Like Abiomed And Alibaba Drive This MainStay Fund's Outperformance
 
 PAUL KATZEFF6/01/2018
 How hot is $12.5 billion MainStay Large Cap Growth Fund (MLAAX) right now? Very! Driven by leading  growth stocks like Abiomed ( ABMD), Alibaba ( BABA), Amazon.com ( AMZN) and Netflix ( NFLX), the MainStay fund is up 13.37% this year going into Thursday.
 
 That  tops 95% of rival large-cap funds focused on growth stocks that are  tracked by Morningstar. And it dwarfs the S&P 500's 2.7%.
 
 Abiomed, which was added to the S&P 500 on Thursday, has grown  earnings per share at a triple-digit pace in the past three quarters.  The maker of cardiac pumping devices is up 103% so far this year.
 
 As of Thursday, Alibaba was up 15% this year. Amazon had climbed 39%. Netflix had notched an 83% gain.
 
 As the fund explains to investors considering buying shares, the  managers look "to diversify holdings across three distinct, yet  complementary, types of earnings growth to participate in different  market cycles."
 
 In addition, the fund sticks to subadvisor Winslow Capital's "no  preferred habitat" approach. That means broad diversification with an  eye to managing risk by not being overexposed to any one area of the  market.
 
 MainStay fund managers Justin Kelly and Patrick Burton cope with  different market environments by adjusting their allocations among  three types, or buckets, of growth stocks.
 
 One bucket holds stocks that Kelly and Burton think will be able to  sustain earnings growth for long periods. The second bucket holds  dynamic growth stocks — stocks in newer industries with rapid growth.  The third bucket holds cyclical growth stocks. Operating in more  economically sensitive sectors, they may be more volatile.
 
 Leading Growth Stocks Abiomed is in the dynamic growth bucket. The stock replaced leisure-lodging stock Wyndham Worldwide ( WYN)  in the S&P 500 index. Many funds, especially index funds, will add  Abiomed to their portfolios just because it is now part of the popular  benchmark.
 
 "Abiomed has had the biggest innovation in cardiac surgery in years  by having a balloon pump to help patients extend the life of their  hearts during cardiac arrest," lead manager Kelly said. "It works  substantially better than all preceding technologies."
 
 The company's market opportunity is about 10 times what its market is  today, Kelly says, as its technology grabs market share over the next  five to 10 years.
 
 Alibaba's Four Markets Alibaba is another dynamic growth holding. It is the leading e-commerce platform in China, and its share is growing.
 
 "Alibaba is pursuing four markets that are extremely large," Burton  said. "The first is its traditional e-commerce business in China. The  second is digital advertising. As the company adds e-commerce customers,  it boosts its advertising business. The third is its cloud computing  business. As it builds its online infrastructure, it can sell that  service to other companies. And the fourth is its emerging retail  business. It is taking its e-commerce and logistics expertise and  applying them to grocery and food delivery, where there is a massive  total available market opportunity."
 
 Alibaba is a member of the  IBD 50 roster of growth stocks. So are Netflix and Abiomed.
 
 Amazon, which is on IBD's  Leaderboard,  is in the fund's consistent growers bucket. The stock barely paused  when it recently took heat amid news that one of the company's Echo  smart-speaker devices recorded a couple's private conversation in their  home and sent it to someone on their contact list without their  knowledge.
 
 "Amazon is our largest holding," Kelly said. "We're still excited  about their two main businesses. The first is retail, which still has a  tremendous runway to go. They have 5% of total retail transactions in  the U.S., but they get 20% of the total growth. That indicates that they  will get to 20% of the total market, so the opportunity is four times  what it is today."
 
 Amazon Web Services is the second business that Kelly and Burton  like. "We think it is in the early stages of moving corporate work flows  from on-premises software to the cloud. Their technology for doing this  is in the front of the industry, so they should remain the leader, with  Microsoft ( MSFT) number two, and that's why Microsoft is our second largest holding."
 
 Other Growth Stocks Among other holdings, ASML ( ASML)  is in the fund's cyclical growth bucket. The Dutch-based company is a  manufacturer of lithography systems used to manufacture integrated  circuits. Its shares are up 15% this year.
 
 "ASML has two key drivers," Burton said. "First is global demand for  semiconductor chips, which is expanding at two-plus times the growth  rate of global GDP. It's driven by growth in cloud computing and mobile  communications."
 
 Burton likes ASML's EUV technology. "It stands for extreme  ultraviolet, and it helps makers of chips. ASML is the only company in  the world with this technology."
 [huge chart for fund cut out--see article via link if interested in the mutual fund]
 
 investors.com
 
 
 
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