HUDSON, Mass.--(BUSINESS WIRE)--Avidia Bank today released a study highlighting the coming wave of investment growth in Health Savings Accounts (HSAs). The study is available at AvidiaHealth.com or AskMrHSA.com. The analysis found that while the ability to invest funds inside an HSA for long-term tax-free growth has long been available, many HSA owners do not even know it exists and only use their accounts for current medical spending. Growing HSA balances and renewed interest in the concept by