Five current and former Tesla employees say the company is prototyping its own "advanced lithium ion battery cells," CNBC reports.

Why it matters: Creating its own batteries could allow Tesla to "offer cheaper, higher-performance electric vehicles than it does today, without having to pay or share data and resources with outside vendors or partners," per CNBC. Tesla currently relies on Panasonic to develop its batteries.

Go deeper: Billion-dollar bets on electric vehicles await payoff

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Analysts expect soaring stock market despite slashed earnings forecasts

Data: FactSet; Chart: Axios Visuals

Despite cutting expectations for companies' earnings by the most in history and revenue by the most since 2009, Wall Street analysts are getting increasingly bullish on the overall direction of the U.S. stock market.

What's happening: Equity analysts are expecting earnings in the second quarter to fall by 43.8% — the most since 2008's fourth quarter 69.1% decline.

Case growth outpacing testing in coronavirus hotspots

Data: The COVID Tracking Project. Note: Vermont and Hawaii were not included because they have fewer than 20 cases per day. Chart: Andrew Witherspoon/Axios

The United States' alarming rise in coronavirus cases isn't due to increased testing — particularly not where cases have grown fastest over the last month.

Why it matters: The U.S. doesn't yet know what it looks like when a pandemic rages on relatively unchecked after the health system has become overwhelmed. It may be about to find out.

The impending retail apocalypse

Illustration: Eniola Odetunde/Axios

Because of the coronavirus and people's buying habits moving online, retail stores are closing everywhere — often for good.

Why it matters: Malls are going belly up. Familiar names like J.C. Penney, Neiman Marcus and J. Crew have filed for bankruptcy. Increasingly, Americans' shopping choices will boil down to a handful of internet Everything Stores and survival-of-the-fittest national chains.