On this week’s episode of Slate Money, Felix Salmon of Fusion, Cathy O’Neil of mathbabe.org, and Slate’s Moneybox columnist Jordan Weissmann discuss: Why you should be worried about last week's Wall Street glitch. Why you shouldn't be worried about China's stock market crash. Are dinner reservation services helping us or hurting us?   Slate Money is sponsored by Casper, an online retailer of premium mattresses for a fraction of the price. Casper mattresses come with free delivery and returns within a 100-day period. And get 50 dollars toward any mattress purchase by visiting casper.com/slatemoney and using the promo “slatemoney.” And by Volvo. Experience the Wonder of Summer. Have a month’s payment on Volvo and spend your summer doing the things that matter to you. Plus get up to five years full coverage, including wear and tear. Go to volvocars.com/us And by MileIQ, the app that automatically tracks and logs your miles, making sure that every dollar is accounted for and leaving you to focus on what’s important.  Try MileIQ for free today by texting “MONEY” to 89800.   Check out other Panoply podcasts at itunes.com/panoply.

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