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Table 1 (cont<strong>in</strong>ued)<br />

Company name Ticker<br />

symbol<br />

Turnover Mkt.<br />

Cap.<br />

m Percentage<br />

<strong>of</strong> aggr.<br />

trades (%)<br />

Trades<br />

per day<br />

LO sub. LO canc. P Eff.<br />

spread<br />

MUENCH.RUECK MUV2 207,353,230 16,396 60,534 20.7 3,425 20,154 16,894 93.9 0.049 0.005<br />

DAIMLERCHRYSLER DCX 187,737,846 30,316 56,736 14.5 3,309 18,722 15,919 36.4 0.055 0.010<br />

DEUTSCHE TELEKOM DTE 350,627,866 34,858 78,884 5.0 4,445 14,498 11,009 15.7 0.072 0.031<br />

DEUTSCHE BANK DBK 309,282,831 38,228 78,083 19.3 3,961 23,169 19,772 67.2 0.044 0.004<br />

ALLIANZ ALV 289,980,556 33,805 64,114 21.4 4,523 29,791 25,882 100.1 0.049 0.010<br />

SIEMENS SIE 321,704,299 52,893 72,831 16.7 4,418 23,659 19,920 64.0 0.041 0.006<br />

Average 108,683,880 14,076 42,972 15.2 2,099 12,785 10,887 44.5<br />

Mkt. cap. is the market capitalization <strong>in</strong> million euros at the end <strong>of</strong> December 2003, m is the average trade size (<strong>in</strong> euros). Percentage <strong>of</strong> Aggr. trades (%) gives the<br />

percentage <strong>of</strong> total trad<strong>in</strong>g volume that has not been executed at the best prices (that is, the order walked up the book). Turnover is the average trad<strong>in</strong>g volume <strong>in</strong><br />

euros per trad<strong>in</strong>g day, trades per day is the average number <strong>of</strong> trades per day, LO sub. and LO canc., respectively, denote the average number <strong>of</strong> non-marketable<br />

limit order submissions and cancelations per day. P, eff. spread and real. spread refer to the sample averages <strong>of</strong> midquote, effective spread and realized spread,<br />

respectively. The average effective spread is computed by tak<strong>in</strong>g two times the absolute difference <strong>of</strong> the transaction price <strong>of</strong> a trade and the prevail<strong>in</strong>g midquote<br />

and averag<strong>in</strong>g over all trades <strong>of</strong> a stock. The average realized spread is computed similarly, but <strong>in</strong>stead <strong>of</strong> tak<strong>in</strong>g the prevail<strong>in</strong>g midquote, we use the midquote five<br />

m<strong>in</strong>utes after the trade. To ensure comparability across stocks, we compute effective and realized spreads relative to the midquote prevail<strong>in</strong>g at the time <strong>of</strong> the trade<br />

and multiply by 100 to obta<strong>in</strong> a % figure. The table is sorted <strong>in</strong> descend<strong>in</strong>g order by the difference <strong>of</strong> effective and realized spread. The sample ranges from January<br />

2, 2004 to March 31, 2004<br />

Real.<br />

spread<br />

Liquidity supply and adverse selection <strong>in</strong> a pure limit order book market 89

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