34, 40 34, Blume, Easley and O Hara(1994)..,. (random walk),. Easley and O Hara(1987). Karpoff(1987) (1987) (+). (private information) (public informa

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, 40 34 (2006 12) * 1) *** *** 1 2. : (i) (+) 30 (), 30 (). (ii) (+). (iii),. (iv) 25% 25% 2~3. (v) 5 30,. I.. (technical analysis). Gallant, Rossi and Tauchen(1992) *.. ** ***

34, 40 34, Blume, Easley and O Hara(1994)..,. (random walk),. Easley and O Hara(1987). Karpoff(1987) (1987) (+). (private information) (public information) [Hirshleifer(1971) Hakansson, Kunkel, and Ohlson(1982) ]... upstairs market.,...., 1, 2

35...... (+) (+). Ying(1966),.. (+) Ying(1966). Crouch(1970) (+). Westerfield(1977) (+), Harris(1986) (+).. Epps(1977),. (+).

36, 40 34 Wood, McInish, and Ord(1985)., Morgan(1976) (+) James and Edmister(1983). (1987), (+). (1997) (+).. Campbell, Grossman and Wang(1993) (), Wang(1994) (+). Brennan, Chordia, and Subrahmanyam(1988),,, (1994) () (). Harris and Raviv(1993). (2001).,. -.. James and Edmister(1983). Chordia and Swaminathan(2000)

37,., (2003) - 1997. Kraus and Stoll(1972) Holthausen, Leftwich, and Mayers(1987, HLM).,,,.,. Kraus and Stoll(1972), HLM(1987),. Kraus and Stoll(1972), HLM(1987)., Ying(1966). Campbell, Grossman, and Wang(1993) Wang(1994) HLM(1987).... II IFB/KSE. III. Kraus and Stoll(1972) HLM(1987)

38, 40 34. IV. II. IFB/KSE Transactions Database. IFB/KSE,. 100 1,,,.. 2003 07 2003 12 6 KOSPI.. 1 2 1,. KOSPI 613. 1) (). 1) KOSPI.

39. 2),... 3)., 4). (), (), ()., 2),. 3), ( ). ( ).. 4) bid-ask spread (ln P t / P t-1).

40, 40 34. 1. KOSPI200..... 1,. ()... 3 1,.,.. 5) 1

41 1 1, 1, 5, 10, 15, 30. 6) 1. 2. 7) 2. 1 5,284 2,074(39%), 3,210 (61%). 2,286 994(43%), 1,292(57%).,. 2. 13,641, 13,854. 28,514, 40,531. 5 1 (sample bias). 5). (1993) ( ). 6) (1, 1, 5, 10, 15, 30 ) 1.,. 7).

42, 40 34 2003 7 12 6 KOSPI ( ) 1.,. 1 2 2. (: %) 1 ~3 2,009(39) 3,099(61) 5,108(97) 3 ~5 47(38) 76(62) 123(2) 5 ~7 8(27) 22(73) 30(1) 7 ~10 5(33) 10(67) 15(.) 10 5(62) 3(38) 8(.) 2,074(39) 3,210(61) 5,284(100) 2 ~3 681(43) 894(57) 1575(69) 3 ~5 238(44) 303(56) 541(24) 5 ~7 45(46) 53(54) 98(4) 7 ~10 18(43) 24(57) 42(2) 10 12(40) 18(60) 30(1) 994(43) 1,292(57) 2,286(100) 3,.,. 09 11 2 50%.

43 1,,. () 13,641 13,854 10,335 10,600 () 9,231 8,825 5,570 4,985 () 125,371 142,173 65,200 57,769 () 28,514 40,531 9,235 10,000 () 59,232 51,041 36,100 30,450 () 305,682 304,942 251,560 250,758 1. 376 457 439 414 388 2074 652 680 670 606 602 3210 1028 1137 1109 1020 990 5284 171 226 232 194 171 994 263 269 262 248 250 1292 434 495 494 442 421 2286

44, 40 34 (%) 09:00~09:30 931(17.6) 433(18.9) 361 177 570 256 09:30~10:00 678(12.8) 291(12.7) 274 142 404 149 10:00~10:30 608(11.5) 256(11.2) 258 106 350 150 10:30~11:00 521(9.9) 227(9.9) 196 97 325 130 11:00~11:30 404(7.6) 180(7.9) 144 74 260 106 11:30~12:00 320(6.1) 149(6.5) 123 69 197 80 12:00~12:30 277(5.2) 98(4.3) 115 46 162 52 12:30~13:00 301(5.7) 122(5.3) 101 52 200 70 13:00~13:30 389(7.4) 170(7.4) 162 81 227 89 13:30~14:00 454(8.6) 212(9.3) 180 94 274 118 14:00~14:30 401(7.6) 148(6.5) 160 56 241 92 5,284 2,286 2,074 994 3,210 1,292 III.. 1 1, 5, 10, 15, 30 1, 8) 1 8) 1 5, 10, 15, 30, 1 1, 1, 5, 10, 15, 30.,.

45. 4 (+), 30 (), 30 (). - (bid-ask spread) ( ) (+). (). 9) (+).. 1 ( ) 30., (+) P b (). () 30 (). 10). 1 -. 1-0.15%, -0.28% 0.4~0.5% 9) 1~30-0.07~-0.13% 5, 10 t.. 10), ().

46, 40 34 1, 5, 10, 15, 30 1. 1 (0) 1, 5, 10, 15, 30. t = ln(p t/p 0) (t=0, 1, 5, 10, 30), P 0, P t t. 95%. (: %) (t ) 0 1 5 10 15 30 0 1 5 10 15 30 0.23 (13.85) -0.02 (-1.23) 0.03 (1.03) -0.01 (-0.42) 0.03 (0.88) -0.06 (-1.26) -0.25 (-15.36) -0.15 (-9.66) -0.14 (-6.81) -0.15 (-5.96) -0.16 (-5.92) -0.16 (-4.70) - 0 + (t ) - 0 + 6.89 30.62 62.49 33.08 37.56 29.36 38.81 24.88 36.31 44.21 20.40 35.39 46.24 18.37 35.39 49.18 14.75 36.07 66.45 28.47 5.08 52.12 32.65 15.23 47.38 24.92 27.69 48.13 20.03 31.84 47.94 19.72 32.34 50.19 15.08 34.74 0.23 (13.60) -0.07 (-4.79) -0.04 (-1.28) -0.06 (-1.83) -0.11 (-2.93) -0.13 (-3.29) -0.19 (-17.32) -0.28 (-14.83) -0.23 (-10.54) -0.25 (-9.55) -0.28 (-9.61) -0.29 (-8.29) 7.55 33.30 59.15 35.61 39.24 25.15 42.56 26.66 30.78 45.67 22.13 32.19 47.79 18.81 33.40 49.90 14.89 35.21 59.67 33.59 6.73 55.03 33.13 11.84 51.08 27.24 21.67 52.71 20.28 27.0 51.39 20.05 28.56 50.93 16.87 32.20. 1 5 30.,.

47 P b P p P s P b P p P s P p: P b: P s: (+) Ying(1966), Karpoff(1987), (1987).,., Wood, McInish, and Ord(1985). 1 1, 5, 10, 15, 30. 5 0.5 30., 30.

48, 40 34 ret t = ln (P t/p 0) (t=1, 5, 10, 15, 30), P 0, P t t.,. P. ret0 ret1 ret5 ret10 ret15 ret30 ret0 ret1 ret5 ret10 ret15 ret30 ret0 ret1 ret5 ret10 ret15 ret30-0.6530 (0.0030) -0.0978-0.1177 <.0001-0.1338 <.0001-0.1461 <.0001-0.1787-0.1569-0.1714-0.1630-0.1681-0.0172 (0.3287) 0.5698 <.0001 0.4676 <.0001 0.4035 <.0001 0.3606 <.0001 0.0253 (0.3639) 0.5785 0.5480 0.4770 0.4398-0.1565 0.5467 0.770606 <.0001 0.710652 <.0001 0.622652 <.0001-0.1471 0.4565 0.7129 0.839631 <.0001 0.71366 <.0001-0.0957 (0.0006) 0.5963 0.7706 0.7107 0.6227-0.08740 (0.0017) 0.4850 0.7388 0.8396 0.7137-0.1471 0.4056 0.6054 0.7861 0.794833 <.0001-0.0720 (0.0097) 0.4430 0.6536 0.8038 0.7948-0.1131 0.3482 0.5126 0.6162 0.7227-0.0640 (0.0215) 0.3806 0.5448 0.6459 0.7505. (+) Wang(1994).

49 (temporary effect) (permanent effect) Kraus and Stoll(1972) Holthausen, Leftwich, and Mayers (1987),,. 1 6. 6,. -0.31%, -0.19%. -0.61%, -0.55%. 20% -0.28%( ) -0.29%( ), 50% -1.38% -1.19%., -0.91%, -0.74%. 50% -1.83%.. Kraus and Stoll(1972),, HLM (1987).

50, 40 34 P b P e (=P e/p b), 11) P t-1 P e (=P e/p t-1).,,, 95%. (%) t (%) t -0.31-4.86-0.19-2.41 (20%) -0.10-1.40 (20%) -0.09-1.12 (30%) -0.39-3.38 (30%) -0.59-2.07 (50%) -0.73-3.55 (50%) -0.44-1.24-0.61-11.45-0.55-7.13 (20%) -0.28-4.82 (20%) -0.29-4.06 (30%) -0.63-6.76 (30%) -1.42-6.05 (50%) -1.38-8.14 (50%) -1.19-2.01-0.04-0.62 0.05 0.60 (20%) 0.11 1.59 (20%) 0.10 1.35 (30%) -0.10-0.87 (30%) -0.15-0.57 (50%) -0.34-1.65 (50%) -0.14-0.41-0.91-16.88-0.74-9.53 (20%) -0.51-8.66 (20%) -0.46-6.44 (30%) -0.94-9.94 (30%) -1.71-7.18 (50%) -1.83-10.88 (50%) -1.33-2.26 (2003 7 12 6) 613 10 20%, 30%, 50%. 7. 20% 50% 11) HLM(1987) ln(p b/p e) ln(p e/p b).

51 4. (2003 7~12) 613 10 20%, 30%, 50%. t, 95%. 20% 30% 50% 20% 30% 50% 0 1 5 10 15 30 0 1 5 10 15 30 0.22 (19.34) -0.04 (-3.37) -0.02 (-0.87) -0.06 (-2.33) -0.07 (-2.74) -0.12 (-3.67) -0.23 (-24.12) -0.16 (-15.04) -0.15 (-10.02) -0.14 (-7.97) -0.16 (-7.82) -0.17 (-6.60) 0.29 (14.21) -0.03 (-1.56) 0.03 (0.92) -0.02 (-0.56) -0.08 (-1.85) -0.16 (-3.17) -0.31 (-15.28) -0.23 (-6.88) -0.18 (-4.85) -0.18 (-4.35) -0.19 (-4.75) -0.19 (-4.15) 0.39 (6.79) -0.05 (-1.09) -0.04 (-0.68) 0.01 0.14-0.02 (0.26) -0.14 (-1.35) -0.45 (-12.34) -0.41 (-9.93) -0.34 (-6.74) -0.37 (-6.24) -0.39 (-6.14) -0.43 (-5.76) 0.19 (15.11) -0.05 (-3.96) -0.04 (-1.73) -0.07 (-2.83) -0.09 (-3.14) -0.08 (-2.23) -0.17 (-16.47) -0.19 (-14.09) -0.16 (-9.69) -0.17 (-8.33) -0.21 (-8.39) -0.20 (-6.49) 0.43 (-5.53) -0.11 (-2.44) -0.09 (-1.22) -0.08 (-0.79) -0.24 (-1.99) -0.29 (-2.19) -0.28 (-7.26) -0.50 (-8.42) -0.40 (-5.37) -0.45 (-5.48) -0.49 (-5.19) -0.57 (-5.32) 0.29 ((3.00) -0.13 (-1.49) 0.06 (0.23) 0.05 (0.18) -0.11 (-0.32) -0.31 (-1.23) -0.14 (-4.00) -0.8 (-4.06) -0.64 (-3.12) -0.52 (-2.19) -0.51 (-2.13) -0.54 (-1.84) (%). 0.1%... -0.16% -0.8% 4

52, 40 34,. 4.,.. 8 5 (0), 5 30 ().. 30%,.., (),. 8 2, 5. (+). Chordia, Roll, and Subrahmanyam(2002).

53 1 2 5 ( -) 0, 5 30. 10. t, 95%. (: ) 20% 30% 50% 20% 30% 50% 0 274 (4.98) 5 237 (4.50) 10 239 (3.70) 15 241 (3.20) 20 224 (2.74) 25 228 (2.76) 30 225 (2.57) 0-162 (-7.62) 5-147 (-8.07) 10-163 (-7.84) 15-179 (-8.25) 20-192 (-8.59) 25-205 (-8.81) 30-221 (-9.27) 551 (4.24) 478 (3.95) 486 (4.01) 500 (4.09) 460 (3.56) 481 (3.69) 512 (3.85) -182 (-2.71) -171 (-2.86) -204 (-3.03) -235 (-3.38) -255 (-3.60) -278 (-3.80) -306 (-4.13) 110 (1.70) 77 (0.96) 28 (0.21) 23 (0.13) 6 (0.03) -1 (-.01) -33 (-.15) -181 (-7.65) -166 (-10.14) -184 (-9.47) -199 (-8.85) -215 (-8.60) -227 (-8.37) -241 (8.18) 178 (2.14) 171 (2.48) 214 (2.78) 214 (2.58) 217 (2.60) 216 (2.58) 209 (2.48) -131 (-12.23) -115 (-14.90) -115 (-12.36) -121 (-12.19) -127 (-12.13) -133 (-11.94) -142 (-12.27) 1,639 (0.72) 2,381 (0.97) 2,496 (0.98) 2,195 (0.84) 1,399 (0.52) 1,058 (0.39) 9918 (0.35) -4,345 (-2.19) -3,486 (-4.10) -3,929 (-4.78) -4,952 (-4.90) -5,616 (-5.28) -5,965 (-5.49) -5,911 (-5.25) 429 (1.36) 844 (4.90) 872 (4.83) 905 (4.78) 833 (4.33) 817 (4.18) 859 (4.19) -352 (-1.69) -844 (-5.05) -954 (-5.09) -1,065 (-5.28) -1,217 (-5.41) -1,331 (-5.51) -1,422 (-5.59) 5,172 (0.60) 6,617 (0.71) 6,781 (0.70) 6,364 (0.64) 3,563 (0.35) 2,251 (0.22) 1,911 (0.18) -6,384 (-1.47) -5,533 (-4.76) -7,080 (-4.95) -10,180 (-3.95) -12,583 (-4.36) -13,656 (-4.50) -13,232 (-4.06) -68 (-0.02) 1,041 (0.70) 1,700 (0.94) -928 (-0.39) -1,061 (-0.44) -880 (-0.35) -935 (-0.37) -31,095 (-1.50) -18,725 (-1.86) -18,115 (-1.98) -19,583 (-2.14) -18,469 (-2.06) -18,270 (-2.08) -18,286 (-2.13), ().

54, 40 34 0-50 누적주문불균형 - 매도주도 ( 거래량기준 ) 0 5 분 10 분 15 분 20 분 25 분 30 분 ( 매수 - 매도, 천주 ) -100-150 -200-250 -300-350 시간 전체상 (20%) 중 (30%) 하 (50%) 8 () ( 12) -). IV. 1 2., 1 (+), 30 (). (+) ().., 1, 30 (). 12) - 30.

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59 The Effects of High-volume Stock Trades on their Returns and Order Imbalances 13)Won Seok Kang** Jaeho Cho** This paper examines the effects of high-volume trades on their returns and order imbalances in the Korean stock market, where a high-volume trade is defined by a trading volume exceeding 10,000 shares or 200 million won. Having computed log-returns and order imbalances before and after high-volume trades, we find the following evidences: (i) Returns on buyer-initiated transactions were positive before the trades but continued to be negative for 30 minutes after the trades, whereas returns on seller-initiated transactions were all negative throughout the period before and after the trades. (ii) Returns after high-volume trades showed a positive autocorrelation. (iii) Buyer-initiated trades had temporary price effects only while seller-initiated trades had both temporary and permanent price effects. (vi) After the trades, absolute values of returns on small-firm stocks were 2~3 times as high as those on large-firm stocks. (v) After the trades, absolute values of cumulative order imbalances showed no pattern in the buyer-initiated case but kept increasing in the seller-initiated case. Keywords: high-volume trade, buyer(seller)-initiated transaction, temporary (permanent) price effect, order imbalance *Korea Military Acacemy **College of Business Administration, Seoul National University