Even as the stock market is heads higher, the “Magnificent Seven” trade is beginning to fizzle, with Apple, Alphabet, and Tesla sputtering through the first quarter of 2024. Hardika Singh for The Wall Street Journal: The S&P 500 climbed 10% in the first quarter, its best start to a year since 2019, even though two of its biggest constituents suffered double-digit declines. Apple shares fell 11% in the first three months of the year, while Tesla dropped almost 30%. Alphabet shares sputtered for much of the period before making a run in the past three weeks and ending up 8%. The other four big tech stocks in the group known as the Magnificent Seven — Nvidia, Meta Platforms, Microsoft,…