UCG / Contributor / Getty Images Key Takeaways The S&P 500 plunged by 1.7% on Friday, Feb. 21, as weak economic data and earnings sent the benchmark index lower for the second straight session. Cloud services provider Akamai Technology shares plummeted after its 2025 outlook showed revenue growth would be slower than expected. Covid vaccine maker Moderna shares jumped after reports of a new coronavirus in China. Major U.S. equities indexes fell to end a holiday-shortened week. Markets stepped back from record-high levels as traders reacted to underwhelming economic data and earnings forecasts. The S&P 500 fell by 1.7% to…