us companies are stepping up share buybacks supporting a struggling stock market in the face of mounting geopolitical tension and fears that earnings growth will wane once the federal reserve raises interest rates the 10 biggest repurchases for sp 500 index companies last quarter totaled 86 billion up almost 30 from a year earlier led by apple inc meta platforms inc and google parent alphabet inc data compiled by bloomberg show the list isn’t complete with nearly 20 of index members scheduled to report data in the coming weeks