Even though it was the only bank to fail the most recent round of Federal Reserve stress tests (though four others had their capital plans rejected), Zions Bancorporation (NASDAQ:ZION)’s stock price hasn’t really been punished, it’s just been volatile for the last month. Now we know that Gator Financial Partners has been long on Zion for more than a year, and that it was advancing its thesis that Zions is undervalued because of its hidden earnings power just before news about the stress test broke. Zions prefers cash to bonds ahead of likely interest rate rise “The fund has owned…