Much of what you say is true, and scary. I hope the bubble doesn't burst before next Thursday the 22nd so I can take a nice profit from SGH. MU, a manufacturer of DRAM memory cells, has had a big move up over the past month from about $40/sh. to about $60/sh. It's reasonable to assume that SGH has had an excellent quarter although the share price has not risen accordingly, but it should continue to perform well in the near future.
SGMO is a longer-term speculative stock. Why would Pfizer and Gilead/Kite put up so much money upfront if they didn't believe in SGMO's zinc finger nuclease gene editing technology?
I think the upside in AMAT is limited at this point and is susceptible to any general market downturn. LRCX is now trading at or above analysts target prices. So I'll be looking for other short term, swing trades.
The big tax cuts will help corporations increase profits and increase share buyback programs boding well for further appreciation in stock prices. But you're right, I wouldn't be surprised to see a huge market downturn at any time for the reasons you have elucidated
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