In the busiest week for bank earnings, watch out for this one key level

Bank of America, U.S. Bancorp, Charles Schwab, BlackRock and Goldman Sachs are the latest financials stocks to report earnings Wednesday.

Those companies join major banks including JPMorgan, Wells Fargo and Citibank which have reported in recent days in what is the busiest week of the earnings season for the banking industry.

Earnings beat or miss, Miller Tabak equity strategist Matt Maley is watching one key level in the space to determine whether a big bank breakout is coming.

"On a technical basis, you look at the KBE bank ETF, the $40 level, that had been very, very important support," Maley told CNBC's "Trading Nation" on Tuesday. "It finally broke down below it when everything else broke down in December."

The KBE fell below $40 in mid-December for the first time since September 2017. At the December's lows, the ETF had fallen to $34.92. Since that trough, it has rallied 16 percent to $40.52.

"Old support becomes new resistance, so if it can regain this level in a more meaningful way, in other words get a little bit more upside follow-through, I think it will finally show that the banking stocks have finally been washed out and all the bad news is priced into the group," said Maley.

Banks' sharp declines over the past three months have made the group attractive as investor preferences shift, according to Michael Bapis, managing director at Vios Advisors at Rockefeller Capital Management.

"We're in a sector now where the whole rotation to fundamental value is coming into play," Bapis said on "Trading Nation" on Tuesday. "Their balance sheets are super strong, their profitability is rising, and if you look at historical P/Es on many of the banks they're trading eight to 10 times historical earnings, and that's way below what we expected to be at this time."

The KBE ETF trades at 10 times forward earnings, below the S&P 500's 15 times multiple. The ETF's valuation fell to as low as 8.8 times in December, its cheapest valuation since late 2011.

"You're getting good dividend yields, there's a very favorable tax environment for them, and we haven't even seen the profitability that will take place for the change in the tax overhaul," Bapis added.

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Trading Nation is a multimedia financial news program that shows investors and traders how to use the news of the day to their advantage. This is where experts from across the financial world – including macro strategists, technical analysts, stock-pickers, and traders who specialize in options, currencies, and fixed income – come together to find the best ways to capitalize on recent developments in the market. Trading Nation: Where headlines become opportunities.

Michael Santoli

Michael Santoli joined CNBC in October 2015 as a Senior Markets Commentator, based at the network's Global Headquarters in Englewood Cliffs, N.J.  Santoli brings his extensive markets expertise to CNBC's Business Day programming, with a regular appearance on CNBC's “Closing Bell (M-F, 3PM-5PM ET).   In addition, he contributes to CNBCand CNBC PRO, writing regular articles and creating original digital videos.

Previously, Santoli was a Senior Columnist at Yahoo Finance, where he wrote analysis and commentary on the stock market, corporate news and the economy. He also appeared on Yahoo Finance video programs, where he offered insights on the most important business stories of the day, and was a regular contributor to CNBC and other networks.

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