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Retail stocks have been annihilated recently, despite the economy eking out growth. The fundamentals of the retail business look horrible: Sales are stagnating and profitability is getting worse with every passing quarter.

Jeff Bezos and Amazon get most of the credit, but this credit is misplaced. Today, online sales represent only 8.5 percent of total retail sales. Amazon, at $80 billion in sales, accounts only for 1.5 percent of total U.S. retail sales, which at the end of 2016 were around $5.5 trillion. Though it is human nature to look for the simplest explanation, in truth, the confluence of a half-dozen unrelated developments is responsible for weak retail sales.

Our consumption needs and preferences have changed significantly. Ten years ago we spent a pittance on cellphones. Today Apple sells roughly $100 billion worth of i-goods in the U.S., and about two-thirds of those sales are iPhones. Apple’s U.S. market share is about 44 percent, thus the total smart mobile phone market in the U.S. is $150 billion a year. Add spending on smartphone accessories (cases, cables, glass protectors, etc.) and we are probably looking at $200 billion total spending a year on smartphones and accessories.

Ten years ago (before the introduction of the iPhone) smartphone sales were close to zero. Nokia was the king of dumb phones, with sales in the U.S. in 2006 of $4 billion. The total dumb cellphone handset market in the U.S. in 2006 was probably closer to $10 billion.

Consumer income has not changed much since 2006, thus over the last 10 years $190 billion in consumer spending was diverted toward mobile phones.

It gets more interesting. In 2006 a cellphone was a luxury only affordable by adults, but today 7-year-olds have iPhones. Our phone bill per household more than doubled over the last decade. Not to bore you with too many data points, but Verizon’s wireless’s revenue in 2006 was $38 billion. Fast-forward 10 years and it is $89 billion — a $51 billion increase. Verizon’s market share is about 30 percent, thus the total spending increase on wireless services is close to $150 billion.

Between phones and their services, this is $340 billion that will not be spent on T-shirts and shoes.

But we are not done. The combination of mid-single-digit health-care inflation and the proliferation of high-deductible plans has increased consumer direct health-care costs and further chipped away at our discretionary dollars. Health-care spending in the U.S. is $3.3 trillion, and just 3 percent of that figure is almost $100 billion.