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Dig a bit deeper. AMIGOBULLS is the publisher, not author. Original articles are written by two different[0] authors[1].

[0] http://amigobulls.com/articles/tesla-motors-inc-misses-on-de...

[1] http://amigobulls.com/articles/buy-tesla-motors-inc-tsla-sto...

Whatever opinion you already have, you can cite this guy. Modern journalism ftw.

...you get that at two given points in the history of a stock, it might be a must-buy and a must-sell, right?

This isn't correct. These articles were posted 8 days apart from one another with nothing but positive news inbetween. That's not going to shift TSLA from a must-buy to a must-sell...

What OP missed was that the author is actually another website that just reposts all of their content elsewhere. The originals are here[0][1]

[0] http://amigobulls.com/articles/buy-tesla-motors-inc-tsla-sto...

[1] http://amigobulls.com/articles/tesla-motors-inc-misses-on-de...