If it's good enough for Verizon, Walmart, AT&T, Meta, Home Depot, Intel, Comcast, Walt Disney, Visa, Capital One Financial, Lockheed Martin, Amazon, Lowe's, United Parcel Service (UPS), and Texas Instruments... Fiserv is probably using the same tax cut loopholes.
https://www.commondreams.org/news/corporate-stock-buybacks-after-trump-tax-cuts