Yields consistently above 4.5% equate to equity volatility, says Alec Young. He shows the correlation between sharp upticks in yields leading to a "shock to the system" for stocks. On the Mag 7, Alec considers Meta Platforms (META) a "favorite" while listing Tesla (TSLA) as a "riskier" play on the future. Nvidia (NVDA) is another stock Alec expects to thrive if it continues current growth projections.