(sec yield is net of fees. ) you may see sprxx instead of spaxx. They're both very similar and should have the. Websprxx and spaxx are fidelity money market funds designed to generate income by investing in money market instruments. This article will compare both funds to help you. It’s a small difference though. Webspaxx concentrates on federal govt obligations and is likely slightly safer than sprxx though both are very safe. Sprxx pays a slightly higher yield 5. 07 vs 4. 98% for. Webalthough such funds may appear simple…