AmTrust plunges after accounting error warning

AmTrust lost almost a fifth of its market value on Friday after
revealing that its financial statements for the last three years
were inaccurate and further postponing the release of its formal
10-K statement for 2016.
Investors punished the New York-based specialty insurer as its
shares dove almost 19 percent to close at $17.58 in New York
trading.
The plunge followed AmTrust's warning late Thursday that
accounting errors made its consolidated financial statements for
2014, 2015 and the first n