You can use three asterisks in a row, surrounded by whitespace, to get a single asterisk like: "Stocks rose today by * percent".
Oddly, this results in a non-italicized asterisk in the output, contrary to reports in earlier comments that the resulting asterisk would be in italics. There is, however, a zero-length italicized string right before the asterisk in the HTML:
> Oddly, this results in a non-italicized asterisk in the output, contrary to reports in earlier comments that the resulting asterisk would be in italics. There is, however, a zero-length italicized string right before the asterisk in the HTML:
Oddly, this results in a non-italicized asterisk in the output, contrary to reports in earlier comments that the resulting asterisk would be in italics. There is, however, a zero-length italicized string right before the asterisk in the HTML: