Speed of Adjustment and Infraday/Intraday Volatility in the Italian Stock and Futures Markets

DOI: 10.4236/me.2011.25082   PDF   HTML     4,467 Downloads   7,258 Views   Citations


We estimate the speed of adjustment of prices to value changes in the Italian stock and futures markets using variances in different return intervals. The paper presents evidence that an assumption of linearity for the relationship volatility-time is untenable when intraday and infraday data are used jointly. Prices adjust to new information within three days, but the process is complex with evidence of overshooting and divergent movements in the smaller return intervals. Firms behave differently according to their inclusion or exclusion from the MIB30 index. The speed of adjustment is strongly related to firm-specific characteristics and the log of capitalization explains some of the cross-sectional variability in the adjustment coefficients for most of the return intervals.

Share and Cite:

P. Gottardo, "Speed of Adjustment and Infraday/Intraday Volatility in the Italian Stock and Futures Markets," Modern Economy, Vol. 2 No. 5, 2011, pp. 735-742. doi: 10.4236/me.2011.25082.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] K. Daniel, D. Hirshleifer and A. Subrahmanyam, “Investor Psychology and Security Market Under- and Overreactions,” Journal of Finance, Vol. 53, No. 6, 1998, pp. 1839-1885. doi:10.1111/0022-1082.00077
[2] E. F. Fama, “Market Efficiency, Long Term Returns and Behavioral Finance,” Journal of Financial Economics, Vol. 49, No. 3, 1998, pp. 283-306. doi:10.1016/S0304-405X(98)00026-9
[3] J. M. Patell and M. A. Wolfson, “The Intraday Speed of Price Adjustment of Stock Prices to Earnings and Dividend Announcements,” Journal of Financial Economics, Vol. 13, No. 2, 1984, pp. 223-252. doi:10.1016/0304-405X(84)90024-2
[4] J. Hasbrouck and T. Ho, “Order Arrival, Quote Behavior and the Return-Generating Process,” Journal of Finance, Vol. 42, No. 4, 1987, pp. 1035-1049. doi:10.2307/2328305
[5] K. Garbade and W. Silber, “Structural Organization of Secondary Markets: Clearing Frequency, Dealer Activity and Liquidity Risk,” Journal of Finance, Vol. 34, No. 3, 1979, pp. 577-593. doi:10.2307/2327427
[6] K. Garbade and W. Silber, “Price Movement and Price Discovery in Futures and Cash Markets,” Review of Economics and Statistics, Vol. 65, No. 2, 1983, pp. 289- 297. doi:10.2307/1924495
[7] B. Goldman and A. Beja, “Market Prices vs. Equilibrium Prices: Return’s Variance, Serial Correlation, and the Role of the Specialist,” Journal of Finance, Vol. 34, No. 3, 1979, pp. 595-607. doi:10.2307/2327428
[8] Y. Amihud, and H. Mendelson, “Index and Index-Futures Returns,” Journal of Accounting, Auditing & Finance, Vol. 4, No. 2, 1989, pp. 415-431.
[9] A. Damodaran, “A Simple Measure of Price Adjustment Coefficients,” Journal of Finance, Vol. 48, No. 1, 1993, pp. 387-400. doi:10.2307/2328896
[10] N. Brisley and M. Theobald, “A Simple Measure of Price Adjustment Coefficients: A Correction,” Journal of Finance, Vol. 51, No. 1, 1996, pp. 381-382. doi:10.2307/2329314
[11] W. F. M. DeBondt and R. H. Thaler, “Does the Stock Market Overreact?” Journal of Finance, Vol. 40, No. 3, 1985, pp. 793-808. doi:10.2307/2327804
[12] Y. Amihud and H. Mendelson, “Trading Mechanisms and Stock Returns: An Empirical Investigation,” Journal of Finance, Vol. 42, No. 3, 1987, pp. 533-553. doi:10.2307/2328369
[13] Y. Amihud, H. Mendelson and M. Murgia, “Stock Market Microstructure and Return Volatility: Evidence from Italy,” Journal of Banking and Finance, Vol. 14, No. 2-3, 1990, pp. 423-440. doi:10.1016/0378-4266(90)90057-9
[14] P. Gottardo, “Dinamica dei Rendimenti e relazioni lead- lag fra il FIB30 e l’indice MIB30,” Studi e Note di Eco- nomia, Vol. 3, No. 3, 1998, pp. 69-103.
[15] G. Y. N. Tang, “Return Volatilities of Stock Index Futures in Hong Kong: Trading vs Non-Trading Periods,” Journal of Derivatives, Vol. 4, No. 1, 1996, pp. 55-62. doi:10.3905/jod.1996.407961
[16] G. Y. N. Tang and D. T. W. Lui, “Intraday and Intraweek Volatility Patterns of Hang Seng Index and Index Futures, and a Test of the Wait-To-Trade Hypothesis,” Pacific- Basin Finance Journal, Vol. 10, No. 4, 2002, pp. 475-495. doi:10.1016/S0927-538X(02)00069-0

comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.