Note that end-of-year selling is expected. Portfolio managers, pension fund managers, 401(k) or self-managed retirement income funds, etc. have to sell shares for income, expenses, and taxes. Usually, the shares that have risen the most are targets for reduction. Hence TSLA, AMD, etc experience a decrease in share value. Once the selling is over AMD will continue to rise and as one analyst estimates, it may eventually reach a market cap of a trillion.$AMD(AMD)$ $Tesla Motors(TSLA)$