Nanoseconds being truncated in asof
match_time = get_info.index.asof(trade_time)
match_price = get_info[match_time]['Bid Price']

The actual index value:
<Timestamp: 2013-04-10 10:22:01.696815975-0500 CDT, tz=US/Central>

The error returned:
KeyError: u'no item named 2013-04-10 10:22:01.696815-05:00'

It seems to me that it is cutting off the last digits of the timestamp in this example.
